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Annotations
Attributes
Diagrams
Facets
Instances
Properties
Source
Used by
Included schema geometryPrimitives.xsd
Namespace http://standardit.tapio.fi/schemas/forestData/businessacceptance
Annotations
GML is an OGC Standard. Copyright (c) 2001,2005,2010 Open Geospatial Consortium. To obtain additional rights of use, visit http://www.opengeospatial.org/legal/ .
Properties
attribute form default: unqualified
element form default: qualified
version: 3.1.1.2
Element gml:curveMember
Namespace http://www.opengis.net/gml
Annotations
This property element either references a curve via the XLink-attributes or contains the curve element. A curve element is any element which is substitutable for "_Curve".
Diagram
Diagram index2.tmp#id731 index6.tmp#id788 index6.tmp#id1307
Type gml:CurvePropertyType
Properties
content: complex
Used by
Model gml:_Curve
Children gml:_Curve
Instance
<gml:curveMember xlink:actuate="" xlink:arcrole="" xlink:href="" gml:remoteSchema="" xlink:role="" xlink:show="" xlink:title="" xlink:type="simple">
  <gml:_Curve axisLabels="" gid="" gml:id="" srsDimension="" srsName="" uomLabels="">{1,1}</gml:_Curve>
</gml:curveMember>
Attributes
QName Type Fixed Default Use Annotation
gml:remoteSchema anyURI optional
Reference to an XML Schema fragment that specifies the content model of the propertys value. This is in conformance with the XML Schema Section 4.14 Referencing Schemas from Elsewhere.
xlink:actuate xlink:actuateType optional
xlink:arcrole xlink:arcroleType optional
xlink:href xlink:hrefType optional
xlink:role xlink:roleType optional
xlink:show xlink:showType optional
xlink:title xlink:titleAttrType optional
xlink:type xlink:typeType simple optional
Source
<element name="curveMember" type="gml:CurvePropertyType">
  <annotation>
    <documentation>This property element either references a curve via the XLink-attributes or contains the curve element. A curve element is any element which is substitutable for "_Curve".</documentation>
  </annotation>
</element>
Element gml:_Solid
Namespace http://www.opengis.net/gml
Annotations
The "_Solid" element is the abstract head of the substituition group for all (continuous) solid elements.
Diagram
Diagram index2.tmp#id763 index2.tmp#id729 index2.tmp#id749 index2.tmp#id751 index2.tmp#id728 index2.tmp#id727 index6.tmp#id764 index6.tmp#id765 index6.tmp#id726 index6.tmp#id725 index5.tmp#id1593 index17.tmp#id1236 index5.tmp#id1235 index6.tmp#id723
Type gml:AbstractSolidType
Type hierarchy
Properties
content: complex
abstract: true
Substitution Group
Substitution Group Affiliation
Used by
Model gml:metaDataProperty* , gml:description{0,1} , gml:name*
Children gml:description, gml:metaDataProperty, gml:name
Instance
<gml:_Solid axisLabels="" gid="" gml:id="" srsDimension="" srsName="" uomLabels="">
  <gml:metaDataProperty about="" xlink:actuate="" xlink:arcrole="" xlink:href="" gml:remoteSchema="" xlink:role="" xlink:show="" xlink:title="" xlink:type="simple">{0,unbounded}</gml:metaDataProperty>
  <gml:description xlink:actuate="" xlink:arcrole="" xlink:href="" gml:remoteSchema="" xlink:role="" xlink:show="" xlink:title="" xlink:type="simple">{0,1}</gml:description>
  <gml:name codeSpace="">{0,unbounded}</gml:name>
</gml:_Solid>
Attributes
QName Type Fixed Default Use Annotation
axisLabels gml:NCNameList optional
Ordered list of labels for all the axes of this CRS. The gml:axisAbbrev value should be used for these axis labels, after spaces and forbiddden characters are removed. When the srsName attribute is included, this attribute is optional. When the srsName attribute is omitted, this attribute shall also be omitted.
gid string optional
This attribute is included for backward compatibility with GML 2 and is deprecated with GML 3. This identifer is superceded by "gml:id" inherited from AbstractGMLType. The attribute "gid" should not be used anymore and may be deleted in future versions of GML without further notice.
gml:id ID optional
Database handle for the object. It is of XML type ID, so is constrained to be unique in the XML document within which it occurs. An external identifier for the object in the form of a URI may be constructed using standard XML and XPointer methods. This is done by concatenating the URI for the document, a fragment separator, and the value of the id attribute.
srsDimension positiveInteger optional
The "srsDimension" is the length of coordinate sequence (the number of entries in the list). This dimension is specified by the coordinate reference system. When the srsName attribute is omitted, this attribute shall be omitted.
srsName anyURI optional
In general this reference points to a CRS instance of gml:CoordinateReferenceSystemType (see coordinateReferenceSystems.xsd). For well known references it is not required that the CRS description exists at the location the URI points to. If no srsName attribute is given, the CRS must be specified as part of the larger context this geometry element is part of, e.g. a geometric element like point, curve, etc. It is expected that this attribute will be specified at the direct position level only in rare cases.
uomLabels gml:NCNameList optional
Ordered list of unit of measure (uom) labels for all the axes of this CRS. The value of the string in the gml:catalogSymbol should be used for this uom labels, after spaces and forbiddden characters are removed. When the axisLabels attribute is included, this attribute shall also be included. When the axisLabels attribute is omitted, this attribute shall also be omitted.
Source
<element name="_Solid" type="gml:AbstractSolidType" abstract="true" substitutionGroup="gml:_GeometricPrimitive">
  <annotation>
    <documentation>The "_Solid" element is the abstract head of the substituition group for all (continuous) solid elements.</documentation>
  </annotation>
</element>
Element gml:Curve
Namespace http://www.opengis.net/gml
Diagram
Diagram index2.tmp#id763 index2.tmp#id729 index2.tmp#id749 index2.tmp#id751 index2.tmp#id728 index2.tmp#id727 index6.tmp#id764 index6.tmp#id765 index6.tmp#id726 index6.tmp#id725 index6.tmp#id790 index5.tmp#id1633 index5.tmp#id1632 index6.tmp#id788
Type gml:CurveType
Type hierarchy
Properties
content: complex
Substitution Group Affiliation
Model gml:metaDataProperty* , gml:description{0,1} , gml:name* , gml:segments
Children gml:description, gml:metaDataProperty, gml:name, gml:segments
Instance
<gml:Curve axisLabels="" gid="" gml:id="" srsDimension="" srsName="" uomLabels="">
  <gml:metaDataProperty about="" xlink:actuate="" xlink:arcrole="" xlink:href="" gml:remoteSchema="" xlink:role="" xlink:show="" xlink:title="" xlink:type="simple">{0,unbounded}</gml:metaDataProperty>
  <gml:description xlink:actuate="" xlink:arcrole="" xlink:href="" gml:remoteSchema="" xlink:role="" xlink:show="" xlink:title="" xlink:type="simple">{0,1}</gml:description>
  <gml:name codeSpace="">{0,unbounded}</gml:name>
</gml:Curve>
Attributes
QName Type Fixed Default Use Annotation
axisLabels gml:NCNameList optional
Ordered list of labels for all the axes of this CRS. The gml:axisAbbrev value should be used for these axis labels, after spaces and forbiddden characters are removed. When the srsName attribute is included, this attribute is optional. When the srsName attribute is omitted, this attribute shall also be omitted.
gid string optional
This attribute is included for backward compatibility with GML 2 and is deprecated with GML 3. This identifer is superceded by "gml:id" inherited from AbstractGMLType. The attribute "gid" should not be used anymore and may be deleted in future versions of GML without further notice.
gml:id ID optional
Database handle for the object. It is of XML type ID, so is constrained to be unique in the XML document within which it occurs. An external identifier for the object in the form of a URI may be constructed using standard XML and XPointer methods. This is done by concatenating the URI for the document, a fragment separator, and the value of the id attribute.
srsDimension positiveInteger optional
The "srsDimension" is the length of coordinate sequence (the number of entries in the list). This dimension is specified by the coordinate reference system. When the srsName attribute is omitted, this attribute shall be omitted.
srsName anyURI optional
In general this reference points to a CRS instance of gml:CoordinateReferenceSystemType (see coordinateReferenceSystems.xsd). For well known references it is not required that the CRS description exists at the location the URI points to. If no srsName attribute is given, the CRS must be specified as part of the larger context this geometry element is part of, e.g. a geometric element like point, curve, etc. It is expected that this attribute will be specified at the direct position level only in rare cases.
uomLabels gml:NCNameList optional
Ordered list of unit of measure (uom) labels for all the axes of this CRS. The value of the string in the gml:catalogSymbol should be used for this uom labels, after spaces and forbiddden characters are removed. When the axisLabels attribute is included, this attribute shall also be included. When the axisLabels attribute is omitted, this attribute shall also be omitted.
Source
<element name="Curve" type="gml:CurveType" substitutionGroup="gml:_Curve"/>
Element gml:segments
Namespace http://www.opengis.net/gml
Annotations
This property element contains a list of curve segments. The order of the elements is significant and shall be preserved when processing the array.
Diagram
Diagram index5.tmp#id1635 index5.tmp#id1634
Type gml:CurveSegmentArrayPropertyType
Properties
content: complex
Used by
Complex Type gml:CurveType
Model gml:_CurveSegment*
Children gml:_CurveSegment
Instance
<gml:segments>
  <gml:_CurveSegment numDerivativeInterior="0" numDerivativesAtEnd="0" numDerivativesAtStart="0">{0,unbounded}</gml:_CurveSegment>
</gml:segments>
Source
<element name="segments" type="gml:CurveSegmentArrayPropertyType">
  <annotation>
    <documentation>This property element contains a list of curve segments. The order of the elements is significant and shall be preserved when processing the array.</documentation>
  </annotation>
</element>
Element gml:_CurveSegment
Namespace http://www.opengis.net/gml
Annotations
The "_CurveSegment" element is the abstract head of the substituition group for all curve segment elements, i.e. continuous segments of the same interpolation mechanism.
Diagram
Diagram index5.tmp#id1652 index5.tmp#id1653 index5.tmp#id1654 index5.tmp#id1651 index5.tmp#id1642 index5.tmp#id1637 index5.tmp#id1640 index5.tmp#id1649 index5.tmp#id1645 index5.tmp#id1648 index5.tmp#id1646 index5.tmp#id1636 index5.tmp#id1644
Type gml:AbstractCurveSegmentType
Properties
content: complex
abstract: true
Substitution Group
Used by
Model
Attributes
QName Type Fixed Default Use Annotation
numDerivativeInterior integer 0 optional
The attribute "numDerivativesInterior" specifies the type of continuity that is guaranteed interior to the curve. The default value of "0" means simple continuity, which is a mandatory minimum level of continuity. This level is referred to as "C 0 " in mathematical texts. A value of 1 means that the function and its first derivative are continuous at the appropriate end point: "C 1 " continuity. A value of "n" for any integer means the function and its first n derivatives are continuous: "C n " continuity. NOTE: Use of these values is only appropriate when the basic curve definition is an underdetermined system. For example, line string segments cannot support continuity above C 0 , since there is no spare control parameter to adjust the incoming angle at the end points of the segment. Spline functions on the other hand often have extra degrees of freedom on end segments that allow them to adjust the values of the derivatives to support C 1 or higher continuity.
numDerivativesAtEnd integer 0 optional
The attribute "numDerivativesAtEnd" specifies the type of continuity between this curve segment and its successor. If this is the last curve segment in the curve, one of these values, as appropriate, is ignored. The default value of "0" means simple continuity, which is a mandatory minimum level of continuity. This level is referred to as "C 0 " in mathematical texts. A value of 1 means that the function and its first derivative are continuous at the appropriate end point: "C 1 " continuity. A value of "n" for any integer means the function and its first n derivatives are continuous: "C n " continuity. NOTE: Use of these values is only appropriate when the basic curve definition is an underdetermined system. For example, line string segments cannot support continuity above C 0 , since there is no spare control parameter to adjust the incoming angle at the end points of the segment. Spline functions on the other hand often have extra degrees of freedom on end segments that allow them to adjust the values of the derivatives to support C 1 or higher continuity.
numDerivativesAtStart integer 0 optional
The attribute "numDerivativesAtStart" specifies the type of continuity between this curve segment and its predecessor. If this is the first curve segment in the curve, one of these values, as appropriate, is ignored. The default value of "0" means simple continuity, which is a mandatory minimum level of continuity. This level is referred to as "C 0 " in mathematical texts. A value of 1 means that the function and its first derivative are continuous at the appropriate end point: "C 1 " continuity. A value of "n" for any integer means the function and its first n derivatives are continuous: "C n " continuity. NOTE: Use of these values is only appropriate when the basic curve definition is an underdetermined system. For example, line string segments cannot support continuity above C 0 , since there is no spare control parameter to adjust the incoming angle at the end points of the segment. Spline functions on the other hand often have extra degrees of freedom on end segments that allow them to adjust the values of the derivatives to support C 1 or higher continuity.
Source
<element name="_CurveSegment" type="gml:AbstractCurveSegmentType" abstract="true">
  <annotation>
    <documentation>The "_CurveSegment" element is the abstract head of the substituition group for all curve segment elements, i.e. continuous segments of the same interpolation mechanism.</documentation>
  </annotation>
</element>
Element gml:baseCurve
Namespace http://www.opengis.net/gml
Annotations
This property element either references a curve via the XLink-attributes or contains the curve element. A curve element is any element which is substitutable for "_Curve".
Diagram
Diagram index2.tmp#id731 index6.tmp#id788 index6.tmp#id1307
Type gml:CurvePropertyType
Properties
content: complex
Used by
Model gml:_Curve
Children gml:_Curve
Instance
<gml:baseCurve xlink:actuate="" xlink:arcrole="" xlink:href="" gml:remoteSchema="" xlink:role="" xlink:show="" xlink:title="" xlink:type="simple">
  <gml:_Curve axisLabels="" gid="" gml:id="" srsDimension="" srsName="" uomLabels="">{1,1}</gml:_Curve>
</gml:baseCurve>
Attributes
QName Type Fixed Default Use Annotation
gml:remoteSchema anyURI optional
Reference to an XML Schema fragment that specifies the content model of the propertys value. This is in conformance with the XML Schema Section 4.14 Referencing Schemas from Elsewhere.
xlink:actuate xlink:actuateType optional
xlink:arcrole xlink:arcroleType optional
xlink:href xlink:hrefType optional
xlink:role xlink:roleType optional
xlink:show xlink:showType optional
xlink:title xlink:titleAttrType optional
xlink:type xlink:typeType simple optional
Source
<element name="baseCurve" type="gml:CurvePropertyType">
  <annotation>
    <appinfo>
      <sch:pattern name="Check either href or content not both">
        <sch:rule context="gml:baseCurve">
          <sch:extends rule="hrefOrContent"/>
        </sch:rule>
      </sch:pattern>
    </appinfo>
    <documentation>This property element either references a curve via the XLink-attributes or contains the curve element. A curve element is any element which is substitutable for "_Curve".</documentation>
  </annotation>
</element>
Element gml:OrientableCurve
Namespace http://www.opengis.net/gml
Diagram
Diagram index2.tmp#id763 index2.tmp#id729 index2.tmp#id749 index2.tmp#id751 index2.tmp#id728 index2.tmp#id727 index6.tmp#id764 index6.tmp#id765 index6.tmp#id726 index6.tmp#id725 index6.tmp#id790 index5.tmp#id1657 index5.tmp#id1655 index5.tmp#id1656 index6.tmp#id788
Type gml:OrientableCurveType
Type hierarchy
Properties
content: complex
Substitution Group Affiliation
Model gml:metaDataProperty* , gml:description{0,1} , gml:name* , gml:baseCurve
Children gml:baseCurve, gml:description, gml:metaDataProperty, gml:name
Instance
<gml:OrientableCurve axisLabels="" gid="" gml:id="" orientation="+" srsDimension="" srsName="" uomLabels="">
  <gml:metaDataProperty about="" xlink:actuate="" xlink:arcrole="" xlink:href="" gml:remoteSchema="" xlink:role="" xlink:show="" xlink:title="" xlink:type="simple">{0,unbounded}</gml:metaDataProperty>
  <gml:description xlink:actuate="" xlink:arcrole="" xlink:href="" gml:remoteSchema="" xlink:role="" xlink:show="" xlink:title="" xlink:type="simple">{0,1}</gml:description>
  <gml:name codeSpace="">{0,unbounded}</gml:name>
</gml:OrientableCurve>
Attributes
QName Type Fixed Default Use Annotation
axisLabels gml:NCNameList optional
Ordered list of labels for all the axes of this CRS. The gml:axisAbbrev value should be used for these axis labels, after spaces and forbiddden characters are removed. When the srsName attribute is included, this attribute is optional. When the srsName attribute is omitted, this attribute shall also be omitted.
gid string optional
This attribute is included for backward compatibility with GML 2 and is deprecated with GML 3. This identifer is superceded by "gml:id" inherited from AbstractGMLType. The attribute "gid" should not be used anymore and may be deleted in future versions of GML without further notice.
gml:id ID optional
Database handle for the object. It is of XML type ID, so is constrained to be unique in the XML document within which it occurs. An external identifier for the object in the form of a URI may be constructed using standard XML and XPointer methods. This is done by concatenating the URI for the document, a fragment separator, and the value of the id attribute.
orientation gml:SignType + optional
If the orientation is "+", then the OrientableCurve is identical to the baseCurve. If the orientation is "-", then the OrientableCurve is related to another _Curve with a parameterization that reverses the sense of the curve traversal. "+" is the default value.
srsDimension positiveInteger optional
The "srsDimension" is the length of coordinate sequence (the number of entries in the list). This dimension is specified by the coordinate reference system. When the srsName attribute is omitted, this attribute shall be omitted.
srsName anyURI optional
In general this reference points to a CRS instance of gml:CoordinateReferenceSystemType (see coordinateReferenceSystems.xsd). For well known references it is not required that the CRS description exists at the location the URI points to. If no srsName attribute is given, the CRS must be specified as part of the larger context this geometry element is part of, e.g. a geometric element like point, curve, etc. It is expected that this attribute will be specified at the direct position level only in rare cases.
uomLabels gml:NCNameList optional
Ordered list of unit of measure (uom) labels for all the axes of this CRS. The value of the string in the gml:catalogSymbol should be used for this uom labels, after spaces and forbiddden characters are removed. When the axisLabels attribute is included, this attribute shall also be included. When the axisLabels attribute is omitted, this attribute shall also be omitted.
Source
<element name="OrientableCurve" type="gml:OrientableCurveType" substitutionGroup="gml:_Curve"/>
Element gml:LineStringSegment
Namespace http://www.opengis.net/gml
Diagram
Diagram index5.tmp#id1652 index5.tmp#id1653 index5.tmp#id1654 index5.tmp#id1651 index5.tmp#id1659 index6.tmp#id772 index6.tmp#id720 index6.tmp#id791 index6.tmp#id792 index6.tmp#id775 index5.tmp#id1658 index5.tmp#id1635
Type gml:LineStringSegmentType
Type hierarchy
Properties
content: complex
Substitution Group Affiliation
Used by
Model (gml:pos | gml:pointProperty | gml:pointRep | gml:posList | gml:coordinates)
Children gml:coordinates, gml:pointProperty, gml:pointRep, gml:pos, gml:posList
Instance
<gml:LineStringSegment interpolation="linear" numDerivativeInterior="0" numDerivativesAtEnd="0" numDerivativesAtStart="0">
  <gml:pos axisLabels="" srsDimension="" srsName="" uomLabels="">{1,1}</gml:pos>
  <gml:pointProperty xlink:actuate="" xlink:arcrole="" xlink:href="" gml:remoteSchema="" xlink:role="" xlink:show="" xlink:title="" xlink:type="simple">{1,1}</gml:pointProperty>
  <gml:pointRep xlink:actuate="" xlink:arcrole="" xlink:href="" gml:remoteSchema="" xlink:role="" xlink:show="" xlink:title="" xlink:type="simple">{1,1}</gml:pointRep>
  <gml:posList axisLabels="" count="" srsDimension="" srsName="" uomLabels="">{1,1}</gml:posList>
  <gml:coordinates cs="," decimal="." ts=" ">{1,1}</gml:coordinates>
</gml:LineStringSegment>
Attributes
QName Type Fixed Default Use Annotation
interpolation gml:CurveInterpolationType linear optional
The attribute "interpolation" specifies the curve interpolation mechanism used for this segment. This mechanism uses the control points and control parameters to determine the position of this curve segment. For a LineStringSegment the interpolation is fixed as "linear".
numDerivativeInterior integer 0 optional
The attribute "numDerivativesInterior" specifies the type of continuity that is guaranteed interior to the curve. The default value of "0" means simple continuity, which is a mandatory minimum level of continuity. This level is referred to as "C 0 " in mathematical texts. A value of 1 means that the function and its first derivative are continuous at the appropriate end point: "C 1 " continuity. A value of "n" for any integer means the function and its first n derivatives are continuous: "C n " continuity. NOTE: Use of these values is only appropriate when the basic curve definition is an underdetermined system. For example, line string segments cannot support continuity above C 0 , since there is no spare control parameter to adjust the incoming angle at the end points of the segment. Spline functions on the other hand often have extra degrees of freedom on end segments that allow them to adjust the values of the derivatives to support C 1 or higher continuity.
numDerivativesAtEnd integer 0 optional
The attribute "numDerivativesAtEnd" specifies the type of continuity between this curve segment and its successor. If this is the last curve segment in the curve, one of these values, as appropriate, is ignored. The default value of "0" means simple continuity, which is a mandatory minimum level of continuity. This level is referred to as "C 0 " in mathematical texts. A value of 1 means that the function and its first derivative are continuous at the appropriate end point: "C 1 " continuity. A value of "n" for any integer means the function and its first n derivatives are continuous: "C n " continuity. NOTE: Use of these values is only appropriate when the basic curve definition is an underdetermined system. For example, line string segments cannot support continuity above C 0 , since there is no spare control parameter to adjust the incoming angle at the end points of the segment. Spline functions on the other hand often have extra degrees of freedom on end segments that allow them to adjust the values of the derivatives to support C 1 or higher continuity.
numDerivativesAtStart integer 0 optional
The attribute "numDerivativesAtStart" specifies the type of continuity between this curve segment and its predecessor. If this is the first curve segment in the curve, one of these values, as appropriate, is ignored. The default value of "0" means simple continuity, which is a mandatory minimum level of continuity. This level is referred to as "C 0 " in mathematical texts. A value of 1 means that the function and its first derivative are continuous at the appropriate end point: "C 1 " continuity. A value of "n" for any integer means the function and its first n derivatives are continuous: "C n " continuity. NOTE: Use of these values is only appropriate when the basic curve definition is an underdetermined system. For example, line string segments cannot support continuity above C 0 , since there is no spare control parameter to adjust the incoming angle at the end points of the segment. Spline functions on the other hand often have extra degrees of freedom on end segments that allow them to adjust the values of the derivatives to support C 1 or higher continuity.
Source
<element name="LineStringSegment" type="gml:LineStringSegmentType" substitutionGroup="gml:_CurveSegment"/>
Element gml:ArcString
Namespace http://www.opengis.net/gml
Diagram
Diagram index5.tmp#id1652 index5.tmp#id1653 index5.tmp#id1654 index5.tmp#id1651 index5.tmp#id1662 index5.tmp#id1663 index6.tmp#id772 index6.tmp#id720 index6.tmp#id791 index6.tmp#id792 index6.tmp#id775 index5.tmp#id1661 index5.tmp#id1638 index5.tmp#id1635
Type gml:ArcStringType
Type hierarchy
Properties
content: complex
Substitution Group
Substitution Group Affiliation
Model (gml:pos | gml:pointProperty | gml:pointRep | gml:posList | gml:coordinates)
Children gml:coordinates, gml:pointProperty, gml:pointRep, gml:pos, gml:posList
Instance
<gml:ArcString interpolation="circularArc3Points" numArc="" numDerivativeInterior="0" numDerivativesAtEnd="0" numDerivativesAtStart="0">
  <gml:pos axisLabels="" srsDimension="" srsName="" uomLabels="">{1,1}</gml:pos>
  <gml:pointProperty xlink:actuate="" xlink:arcrole="" xlink:href="" gml:remoteSchema="" xlink:role="" xlink:show="" xlink:title="" xlink:type="simple">{1,1}</gml:pointProperty>
  <gml:pointRep xlink:actuate="" xlink:arcrole="" xlink:href="" gml:remoteSchema="" xlink:role="" xlink:show="" xlink:title="" xlink:type="simple">{1,1}</gml:pointRep>
  <gml:posList axisLabels="" count="" srsDimension="" srsName="" uomLabels="">{1,1}</gml:posList>
  <gml:coordinates cs="," decimal="." ts=" ">{1,1}</gml:coordinates>
</gml:ArcString>
Attributes
QName Type Fixed Default Use Annotation
interpolation gml:CurveInterpolationType circularArc3Points optional
The attribute "interpolation" specifies the curve interpolation mechanism used for this segment. This mechanism uses the control points and control parameters to determine the position of this curve segment. For an ArcString the interpolation is fixed as "circularArc3Points".
numArc integer optional
The number of arcs in the arc string can be explicitly stated in this attribute. The number of control points in the arc string must be 2 * numArc + 1.
numDerivativeInterior integer 0 optional
The attribute "numDerivativesInterior" specifies the type of continuity that is guaranteed interior to the curve. The default value of "0" means simple continuity, which is a mandatory minimum level of continuity. This level is referred to as "C 0 " in mathematical texts. A value of 1 means that the function and its first derivative are continuous at the appropriate end point: "C 1 " continuity. A value of "n" for any integer means the function and its first n derivatives are continuous: "C n " continuity. NOTE: Use of these values is only appropriate when the basic curve definition is an underdetermined system. For example, line string segments cannot support continuity above C 0 , since there is no spare control parameter to adjust the incoming angle at the end points of the segment. Spline functions on the other hand often have extra degrees of freedom on end segments that allow them to adjust the values of the derivatives to support C 1 or higher continuity.
numDerivativesAtEnd integer 0 optional
The attribute "numDerivativesAtEnd" specifies the type of continuity between this curve segment and its successor. If this is the last curve segment in the curve, one of these values, as appropriate, is ignored. The default value of "0" means simple continuity, which is a mandatory minimum level of continuity. This level is referred to as "C 0 " in mathematical texts. A value of 1 means that the function and its first derivative are continuous at the appropriate end point: "C 1 " continuity. A value of "n" for any integer means the function and its first n derivatives are continuous: "C n " continuity. NOTE: Use of these values is only appropriate when the basic curve definition is an underdetermined system. For example, line string segments cannot support continuity above C 0 , since there is no spare control parameter to adjust the incoming angle at the end points of the segment. Spline functions on the other hand often have extra degrees of freedom on end segments that allow them to adjust the values of the derivatives to support C 1 or higher continuity.
numDerivativesAtStart integer 0 optional
The attribute "numDerivativesAtStart" specifies the type of continuity between this curve segment and its predecessor. If this is the first curve segment in the curve, one of these values, as appropriate, is ignored. The default value of "0" means simple continuity, which is a mandatory minimum level of continuity. This level is referred to as "C 0 " in mathematical texts. A value of 1 means that the function and its first derivative are continuous at the appropriate end point: "C 1 " continuity. A value of "n" for any integer means the function and its first n derivatives are continuous: "C n " continuity. NOTE: Use of these values is only appropriate when the basic curve definition is an underdetermined system. For example, line string segments cannot support continuity above C 0 , since there is no spare control parameter to adjust the incoming angle at the end points of the segment. Spline functions on the other hand often have extra degrees of freedom on end segments that allow them to adjust the values of the derivatives to support C 1 or higher continuity.
Source
<element name="ArcString" type="gml:ArcStringType" substitutionGroup="gml:_CurveSegment"/>
Element gml:Arc
Namespace http://www.opengis.net/gml
Diagram
Diagram index5.tmp#id1652 index5.tmp#id1653 index5.tmp#id1654 index5.tmp#id1651 index5.tmp#id1662 index5.tmp#id1663 index6.tmp#id772 index6.tmp#id720 index6.tmp#id791 index6.tmp#id792 index6.tmp#id775 index5.tmp#id1661 index5.tmp#id1665 index6.tmp#id772 index6.tmp#id720 index6.tmp#id791 index6.tmp#id792 index6.tmp#id775 index5.tmp#id1664 index5.tmp#id1639 index5.tmp#id1637
Type gml:ArcType
Type hierarchy
Properties
content: complex
Substitution Group
Substitution Group Affiliation
Model (gml:pos | gml:pointProperty | gml:pointRep | gml:posList | gml:coordinates)
Children gml:coordinates, gml:pointProperty, gml:pointRep, gml:pos, gml:posList
Instance
<gml:Arc interpolation="circularArc3Points" numArc="1" numDerivativeInterior="0" numDerivativesAtEnd="0" numDerivativesAtStart="0">
  <gml:pos axisLabels="" srsDimension="" srsName="" uomLabels="">{1,1}</gml:pos>
  <gml:pointProperty xlink:actuate="" xlink:arcrole="" xlink:href="" gml:remoteSchema="" xlink:role="" xlink:show="" xlink:title="" xlink:type="simple">{1,1}</gml:pointProperty>
  <gml:pointRep xlink:actuate="" xlink:arcrole="" xlink:href="" gml:remoteSchema="" xlink:role="" xlink:show="" xlink:title="" xlink:type="simple">{1,1}</gml:pointRep>
  <gml:posList axisLabels="" count="" srsDimension="" srsName="" uomLabels="">{1,1}</gml:posList>
  <gml:coordinates cs="," decimal="." ts=" ">{1,1}</gml:coordinates>
</gml:Arc>
Attributes
QName Type Fixed Default Use Annotation
interpolation gml:CurveInterpolationType circularArc3Points optional
The attribute "interpolation" specifies the curve interpolation mechanism used for this segment. This mechanism uses the control points and control parameters to determine the position of this curve segment. For an ArcString the interpolation is fixed as "circularArc3Points".
numArc integer 1 optional
An arc is an arc string consiting of a single arc, the attribute is fixed to "1".
numDerivativeInterior integer 0 optional
The attribute "numDerivativesInterior" specifies the type of continuity that is guaranteed interior to the curve. The default value of "0" means simple continuity, which is a mandatory minimum level of continuity. This level is referred to as "C 0 " in mathematical texts. A value of 1 means that the function and its first derivative are continuous at the appropriate end point: "C 1 " continuity. A value of "n" for any integer means the function and its first n derivatives are continuous: "C n " continuity. NOTE: Use of these values is only appropriate when the basic curve definition is an underdetermined system. For example, line string segments cannot support continuity above C 0 , since there is no spare control parameter to adjust the incoming angle at the end points of the segment. Spline functions on the other hand often have extra degrees of freedom on end segments that allow them to adjust the values of the derivatives to support C 1 or higher continuity.
numDerivativesAtEnd integer 0 optional
The attribute "numDerivativesAtEnd" specifies the type of continuity between this curve segment and its successor. If this is the last curve segment in the curve, one of these values, as appropriate, is ignored. The default value of "0" means simple continuity, which is a mandatory minimum level of continuity. This level is referred to as "C 0 " in mathematical texts. A value of 1 means that the function and its first derivative are continuous at the appropriate end point: "C 1 " continuity. A value of "n" for any integer means the function and its first n derivatives are continuous: "C n " continuity. NOTE: Use of these values is only appropriate when the basic curve definition is an underdetermined system. For example, line string segments cannot support continuity above C 0 , since there is no spare control parameter to adjust the incoming angle at the end points of the segment. Spline functions on the other hand often have extra degrees of freedom on end segments that allow them to adjust the values of the derivatives to support C 1 or higher continuity.
numDerivativesAtStart integer 0 optional
The attribute "numDerivativesAtStart" specifies the type of continuity between this curve segment and its predecessor. If this is the first curve segment in the curve, one of these values, as appropriate, is ignored. The default value of "0" means simple continuity, which is a mandatory minimum level of continuity. This level is referred to as "C 0 " in mathematical texts. A value of 1 means that the function and its first derivative are continuous at the appropriate end point: "C 1 " continuity. A value of "n" for any integer means the function and its first n derivatives are continuous: "C n " continuity. NOTE: Use of these values is only appropriate when the basic curve definition is an underdetermined system. For example, line string segments cannot support continuity above C 0 , since there is no spare control parameter to adjust the incoming angle at the end points of the segment. Spline functions on the other hand often have extra degrees of freedom on end segments that allow them to adjust the values of the derivatives to support C 1 or higher continuity.
Source
<element name="Arc" type="gml:ArcType" substitutionGroup="gml:ArcString"/>
Element gml:Circle
Namespace http://www.opengis.net/gml
Diagram
Diagram index5.tmp#id1652 index5.tmp#id1653 index5.tmp#id1654 index5.tmp#id1651 index5.tmp#id1662 index5.tmp#id1663 index6.tmp#id772 index6.tmp#id720 index6.tmp#id791 index6.tmp#id792 index6.tmp#id775 index5.tmp#id1661 index5.tmp#id1665 index6.tmp#id772 index6.tmp#id720 index6.tmp#id791 index6.tmp#id792 index6.tmp#id775 index5.tmp#id1664 index5.tmp#id1666 index5.tmp#id1638
Type gml:CircleType
Type hierarchy
Properties
content: complex
Substitution Group Affiliation
Model (gml:pos | gml:pointProperty | gml:pointRep | gml:posList | gml:coordinates)
Children gml:coordinates, gml:pointProperty, gml:pointRep, gml:pos, gml:posList
Instance
<gml:Circle interpolation="circularArc3Points" numArc="1" numDerivativeInterior="0" numDerivativesAtEnd="0" numDerivativesAtStart="0">
  <gml:pos axisLabels="" srsDimension="" srsName="" uomLabels="">{1,1}</gml:pos>
  <gml:pointProperty xlink:actuate="" xlink:arcrole="" xlink:href="" gml:remoteSchema="" xlink:role="" xlink:show="" xlink:title="" xlink:type="simple">{1,1}</gml:pointProperty>
  <gml:pointRep xlink:actuate="" xlink:arcrole="" xlink:href="" gml:remoteSchema="" xlink:role="" xlink:show="" xlink:title="" xlink:type="simple">{1,1}</gml:pointRep>
  <gml:posList axisLabels="" count="" srsDimension="" srsName="" uomLabels="">{1,1}</gml:posList>
  <gml:coordinates cs="," decimal="." ts=" ">{1,1}</gml:coordinates>
</gml:Circle>
Attributes
QName Type Fixed Default Use Annotation
interpolation gml:CurveInterpolationType circularArc3Points optional
The attribute "interpolation" specifies the curve interpolation mechanism used for this segment. This mechanism uses the control points and control parameters to determine the position of this curve segment. For an ArcString the interpolation is fixed as "circularArc3Points".
numArc integer 1 optional
An arc is an arc string consiting of a single arc, the attribute is fixed to "1".
numDerivativeInterior integer 0 optional
The attribute "numDerivativesInterior" specifies the type of continuity that is guaranteed interior to the curve. The default value of "0" means simple continuity, which is a mandatory minimum level of continuity. This level is referred to as "C 0 " in mathematical texts. A value of 1 means that the function and its first derivative are continuous at the appropriate end point: "C 1 " continuity. A value of "n" for any integer means the function and its first n derivatives are continuous: "C n " continuity. NOTE: Use of these values is only appropriate when the basic curve definition is an underdetermined system. For example, line string segments cannot support continuity above C 0 , since there is no spare control parameter to adjust the incoming angle at the end points of the segment. Spline functions on the other hand often have extra degrees of freedom on end segments that allow them to adjust the values of the derivatives to support C 1 or higher continuity.
numDerivativesAtEnd integer 0 optional
The attribute "numDerivativesAtEnd" specifies the type of continuity between this curve segment and its successor. If this is the last curve segment in the curve, one of these values, as appropriate, is ignored. The default value of "0" means simple continuity, which is a mandatory minimum level of continuity. This level is referred to as "C 0 " in mathematical texts. A value of 1 means that the function and its first derivative are continuous at the appropriate end point: "C 1 " continuity. A value of "n" for any integer means the function and its first n derivatives are continuous: "C n " continuity. NOTE: Use of these values is only appropriate when the basic curve definition is an underdetermined system. For example, line string segments cannot support continuity above C 0 , since there is no spare control parameter to adjust the incoming angle at the end points of the segment. Spline functions on the other hand often have extra degrees of freedom on end segments that allow them to adjust the values of the derivatives to support C 1 or higher continuity.
numDerivativesAtStart integer 0 optional
The attribute "numDerivativesAtStart" specifies the type of continuity between this curve segment and its predecessor. If this is the first curve segment in the curve, one of these values, as appropriate, is ignored. The default value of "0" means simple continuity, which is a mandatory minimum level of continuity. This level is referred to as "C 0 " in mathematical texts. A value of 1 means that the function and its first derivative are continuous at the appropriate end point: "C 1 " continuity. A value of "n" for any integer means the function and its first n derivatives are continuous: "C n " continuity. NOTE: Use of these values is only appropriate when the basic curve definition is an underdetermined system. For example, line string segments cannot support continuity above C 0 , since there is no spare control parameter to adjust the incoming angle at the end points of the segment. Spline functions on the other hand often have extra degrees of freedom on end segments that allow them to adjust the values of the derivatives to support C 1 or higher continuity.
Source
<element name="Circle" type="gml:CircleType" substitutionGroup="gml:Arc"/>
Element gml:ArcStringByBulge
Namespace http://www.opengis.net/gml
Diagram
Diagram index5.tmp#id1652 index5.tmp#id1653 index5.tmp#id1654 index5.tmp#id1651 index5.tmp#id1670 index5.tmp#id1671 index6.tmp#id772 index6.tmp#id720 index6.tmp#id791 index6.tmp#id792 index6.tmp#id775 index5.tmp#id1668 index5.tmp#id1669 index5.tmp#id1667 index5.tmp#id1641 index5.tmp#id1635
Type gml:ArcStringByBulgeType
Type hierarchy
Properties
content: complex
Substitution Group
Substitution Group Affiliation
Model (gml:pos | gml:pointProperty | gml:pointRep | gml:posList | gml:coordinates) , gml:bulge+ , gml:normal+
Children gml:bulge, gml:coordinates, gml:normal, gml:pointProperty, gml:pointRep, gml:pos, gml:posList
Instance
<gml:ArcStringByBulge interpolation="circularArc2PointWithBulge" numArc="" numDerivativeInterior="0" numDerivativesAtEnd="0" numDerivativesAtStart="0">
  <gml:pos axisLabels="" srsDimension="" srsName="" uomLabels="">{1,1}</gml:pos>
  <gml:pointProperty xlink:actuate="" xlink:arcrole="" xlink:href="" gml:remoteSchema="" xlink:role="" xlink:show="" xlink:title="" xlink:type="simple">{1,1}</gml:pointProperty>
  <gml:pointRep xlink:actuate="" xlink:arcrole="" xlink:href="" gml:remoteSchema="" xlink:role="" xlink:show="" xlink:title="" xlink:type="simple">{1,1}</gml:pointRep>
  <gml:posList axisLabels="" count="" srsDimension="" srsName="" uomLabels="">{1,1}</gml:posList>
  <gml:coordinates cs="," decimal="." ts=" ">{1,1}</gml:coordinates>
  <gml:bulge>{1,unbounded}</gml:bulge>
  <gml:normal axisLabels="" srsDimension="" srsName="" uomLabels="">{1,unbounded}</gml:normal>
</gml:ArcStringByBulge>
Attributes
QName Type Fixed Default Use Annotation
interpolation gml:CurveInterpolationType circularArc2PointWithBulge optional
The attribute "interpolation" specifies the curve interpolation mechanism used for this segment. This mechanism uses the control points and control parameters to determine the position of this curve segment. For an ArcStringByBulge the interpolation is fixed as "circularArc2PointWithBulge".
numArc integer optional
The number of arcs in the arc string can be explicitly stated in this attribute. The number of control points in the arc string must be numArc + 1.
numDerivativeInterior integer 0 optional
The attribute "numDerivativesInterior" specifies the type of continuity that is guaranteed interior to the curve. The default value of "0" means simple continuity, which is a mandatory minimum level of continuity. This level is referred to as "C 0 " in mathematical texts. A value of 1 means that the function and its first derivative are continuous at the appropriate end point: "C 1 " continuity. A value of "n" for any integer means the function and its first n derivatives are continuous: "C n " continuity. NOTE: Use of these values is only appropriate when the basic curve definition is an underdetermined system. For example, line string segments cannot support continuity above C 0 , since there is no spare control parameter to adjust the incoming angle at the end points of the segment. Spline functions on the other hand often have extra degrees of freedom on end segments that allow them to adjust the values of the derivatives to support C 1 or higher continuity.
numDerivativesAtEnd integer 0 optional
The attribute "numDerivativesAtEnd" specifies the type of continuity between this curve segment and its successor. If this is the last curve segment in the curve, one of these values, as appropriate, is ignored. The default value of "0" means simple continuity, which is a mandatory minimum level of continuity. This level is referred to as "C 0 " in mathematical texts. A value of 1 means that the function and its first derivative are continuous at the appropriate end point: "C 1 " continuity. A value of "n" for any integer means the function and its first n derivatives are continuous: "C n " continuity. NOTE: Use of these values is only appropriate when the basic curve definition is an underdetermined system. For example, line string segments cannot support continuity above C 0 , since there is no spare control parameter to adjust the incoming angle at the end points of the segment. Spline functions on the other hand often have extra degrees of freedom on end segments that allow them to adjust the values of the derivatives to support C 1 or higher continuity.
numDerivativesAtStart integer 0 optional
The attribute "numDerivativesAtStart" specifies the type of continuity between this curve segment and its predecessor. If this is the first curve segment in the curve, one of these values, as appropriate, is ignored. The default value of "0" means simple continuity, which is a mandatory minimum level of continuity. This level is referred to as "C 0 " in mathematical texts. A value of 1 means that the function and its first derivative are continuous at the appropriate end point: "C 1 " continuity. A value of "n" for any integer means the function and its first n derivatives are continuous: "C n " continuity. NOTE: Use of these values is only appropriate when the basic curve definition is an underdetermined system. For example, line string segments cannot support continuity above C 0 , since there is no spare control parameter to adjust the incoming angle at the end points of the segment. Spline functions on the other hand often have extra degrees of freedom on end segments that allow them to adjust the values of the derivatives to support C 1 or higher continuity.
Source
<element name="ArcStringByBulge" type="gml:ArcStringByBulgeType" substitutionGroup="gml:_CurveSegment"/>
Element gml:ArcStringByBulgeType / gml:bulge
Namespace http://www.opengis.net/gml
Annotations
The bulge controls the offset of each arc's midpoint. The "bulge" is the real number multiplier for the normal that determines the offset direction of the midpoint of each arc. The length of the bulge sequence is exactly 1 less than the length of the control point array, since a bulge is needed for each pair of adjacent points in the control point array. The bulge is not given by a distance, since it is simply a multiplier for the normal. The midpoint of the resulting arc is given by: midPoint = ((startPoint + endPoint)/2.0) + bulge*normal
Diagram
Diagram
Type double
Properties
content: simple
maxOccurs: unbounded
Source
<element name="bulge" type="double" maxOccurs="unbounded">
  <annotation>
    <documentation>The bulge controls the offset of each arc's midpoint. The "bulge" is the real number multiplier for the normal that determines the offset direction of the midpoint of each arc. The length of the bulge sequence is exactly 1 less than the length of the control point array, since a bulge is needed for each pair of adjacent points in the control point array. The bulge is not given by a distance, since it is simply a multiplier for the normal.
The midpoint of the resulting arc is given by: midPoint = ((startPoint + endPoint)/2.0) + bulge*normal</documentation>
  </annotation>
</element>
Element gml:ArcStringByBulgeType / gml:normal
Namespace http://www.opengis.net/gml
Annotations
The attribute "normal" is a vector normal (perpendicular) to the chord of the arc, the line joining the first and last point of the arc. In a 2D coordinate system, there are only two possible directions for the normal, and it is often given as a signed real, indicating its length, with a positive sign indicating a left turn angle from the chord line, and a negative sign indicating a right turn from the chord. In 3D, the normal determines the plane of the arc, along with the start and endPoint of the arc. The normal is usually a unit vector, but this is not absolutely necessary. If the normal is a zero vector, the geometric object becomes equivalent to the straight line between the two end points. The length of the normal sequence is exactly the same as for the bulge sequence, 1 less than the control point sequence length.
Diagram
Diagram index23.tmp#id774 index6.tmp#id765 index6.tmp#id1250
Type gml:VectorType
Type hierarchy
Properties
content: complex
maxOccurs: unbounded
Attributes
QName Type Fixed Default Use Annotation
axisLabels gml:NCNameList optional
Ordered list of labels for all the axes of this CRS. The gml:axisAbbrev value should be used for these axis labels, after spaces and forbiddden characters are removed. When the srsName attribute is included, this attribute is optional. When the srsName attribute is omitted, this attribute shall also be omitted.
srsDimension positiveInteger optional
The "srsDimension" is the length of coordinate sequence (the number of entries in the list). This dimension is specified by the coordinate reference system. When the srsName attribute is omitted, this attribute shall be omitted.
srsName anyURI optional
In general this reference points to a CRS instance of gml:CoordinateReferenceSystemType (see coordinateReferenceSystems.xsd). For well known references it is not required that the CRS description exists at the location the URI points to. If no srsName attribute is given, the CRS must be specified as part of the larger context this geometry element is part of, e.g. a geometric element like point, curve, etc. It is expected that this attribute will be specified at the direct position level only in rare cases.
uomLabels gml:NCNameList optional
Ordered list of unit of measure (uom) labels for all the axes of this CRS. The value of the string in the gml:catalogSymbol should be used for this uom labels, after spaces and forbiddden characters are removed. When the axisLabels attribute is included, this attribute shall also be included. When the axisLabels attribute is omitted, this attribute shall also be omitted.
Source
<element name="normal" type="gml:VectorType" maxOccurs="unbounded">
  <annotation>
    <documentation>The attribute "normal" is a vector normal (perpendicular) to the chord of the arc, the line joining the first and last
point of the arc. In a 2D coordinate system, there are only two possible directions for the normal, and it is often given as a signed real, indicating its length, with a positive sign indicating a left turn angle from the chord line, and a negative sign indicating a right turn from the chord. In 3D, the normal determines the plane of the arc, along with the start and endPoint of the arc.
The normal is usually a unit vector, but this is not absolutely necessary. If the normal is a zero vector, the geometric object becomes equivalent to the straight line between the two end points. The length of the normal sequence is exactly the same as for the bulge sequence, 1 less than the control point sequence length.</documentation>
  </annotation>
</element>
Element gml:ArcByBulge
Namespace http://www.opengis.net/gml
Diagram
Diagram index5.tmp#id1652 index5.tmp#id1653 index5.tmp#id1654 index5.tmp#id1651 index5.tmp#id1670 index5.tmp#id1671 index6.tmp#id772 index6.tmp#id720 index6.tmp#id791 index6.tmp#id792 index6.tmp#id775 index5.tmp#id1668 index5.tmp#id1669 index5.tmp#id1667 index5.tmp#id1675 index6.tmp#id772 index6.tmp#id720 index6.tmp#id791 index6.tmp#id792 index6.tmp#id775 index5.tmp#id1673 index5.tmp#id1674 index5.tmp#id1672 index5.tmp#id1640
Type gml:ArcByBulgeType
Type hierarchy
Properties
content: complex
Substitution Group Affiliation
Model (gml:pos | gml:pointProperty | gml:pointRep | gml:posList | gml:coordinates) , gml:bulge , gml:normal
Children gml:bulge, gml:coordinates, gml:normal, gml:pointProperty, gml:pointRep, gml:pos, gml:posList
Instance
<gml:ArcByBulge interpolation="circularArc2PointWithBulge" numArc="1" numDerivativeInterior="0" numDerivativesAtEnd="0" numDerivativesAtStart="0">
  <gml:pos axisLabels="" srsDimension="" srsName="" uomLabels="">{1,1}</gml:pos>
  <gml:pointProperty xlink:actuate="" xlink:arcrole="" xlink:href="" gml:remoteSchema="" xlink:role="" xlink:show="" xlink:title="" xlink:type="simple">{1,1}</gml:pointProperty>
  <gml:pointRep xlink:actuate="" xlink:arcrole="" xlink:href="" gml:remoteSchema="" xlink:role="" xlink:show="" xlink:title="" xlink:type="simple">{1,1}</gml:pointRep>
  <gml:posList axisLabels="" count="" srsDimension="" srsName="" uomLabels="">{1,1}</gml:posList>
  <gml:coordinates cs="," decimal="." ts=" ">{1,1}</gml:coordinates>
  <gml:bulge>{1,1}</gml:bulge>
  <gml:normal axisLabels="" srsDimension="" srsName="" uomLabels="">{1,1}</gml:normal>
</gml:ArcByBulge>
Attributes
QName Type Fixed Default Use Annotation
interpolation gml:CurveInterpolationType circularArc2PointWithBulge optional
The attribute "interpolation" specifies the curve interpolation mechanism used for this segment. This mechanism uses the control points and control parameters to determine the position of this curve segment. For an ArcStringByBulge the interpolation is fixed as "circularArc2PointWithBulge".
numArc integer 1 optional
An arc is an arc string consiting of a single arc, the attribute is fixed to "1".
numDerivativeInterior integer 0 optional
The attribute "numDerivativesInterior" specifies the type of continuity that is guaranteed interior to the curve. The default value of "0" means simple continuity, which is a mandatory minimum level of continuity. This level is referred to as "C 0 " in mathematical texts. A value of 1 means that the function and its first derivative are continuous at the appropriate end point: "C 1 " continuity. A value of "n" for any integer means the function and its first n derivatives are continuous: "C n " continuity. NOTE: Use of these values is only appropriate when the basic curve definition is an underdetermined system. For example, line string segments cannot support continuity above C 0 , since there is no spare control parameter to adjust the incoming angle at the end points of the segment. Spline functions on the other hand often have extra degrees of freedom on end segments that allow them to adjust the values of the derivatives to support C 1 or higher continuity.
numDerivativesAtEnd integer 0 optional
The attribute "numDerivativesAtEnd" specifies the type of continuity between this curve segment and its successor. If this is the last curve segment in the curve, one of these values, as appropriate, is ignored. The default value of "0" means simple continuity, which is a mandatory minimum level of continuity. This level is referred to as "C 0 " in mathematical texts. A value of 1 means that the function and its first derivative are continuous at the appropriate end point: "C 1 " continuity. A value of "n" for any integer means the function and its first n derivatives are continuous: "C n " continuity. NOTE: Use of these values is only appropriate when the basic curve definition is an underdetermined system. For example, line string segments cannot support continuity above C 0 , since there is no spare control parameter to adjust the incoming angle at the end points of the segment. Spline functions on the other hand often have extra degrees of freedom on end segments that allow them to adjust the values of the derivatives to support C 1 or higher continuity.
numDerivativesAtStart integer 0 optional
The attribute "numDerivativesAtStart" specifies the type of continuity between this curve segment and its predecessor. If this is the first curve segment in the curve, one of these values, as appropriate, is ignored. The default value of "0" means simple continuity, which is a mandatory minimum level of continuity. This level is referred to as "C 0 " in mathematical texts. A value of 1 means that the function and its first derivative are continuous at the appropriate end point: "C 1 " continuity. A value of "n" for any integer means the function and its first n derivatives are continuous: "C n " continuity. NOTE: Use of these values is only appropriate when the basic curve definition is an underdetermined system. For example, line string segments cannot support continuity above C 0 , since there is no spare control parameter to adjust the incoming angle at the end points of the segment. Spline functions on the other hand often have extra degrees of freedom on end segments that allow them to adjust the values of the derivatives to support C 1 or higher continuity.
Source
<element name="ArcByBulge" type="gml:ArcByBulgeType" substitutionGroup="gml:ArcStringByBulge"/>
Element gml:ArcByBulgeType / gml:bulge
Namespace http://www.opengis.net/gml
Annotations
The bulge controls the offset of each arc's midpoint. The "bulge" is the real number multiplier for the normal that determines the offset direction of the midpoint of each arc. The length of the bulge sequence is exactly 1 less than the length of the control point array, since a bulge is needed for each pair of adjacent points in the control point array. The bulge is not given by a distance, since it is simply a multiplier for the normal. The midpoint of the resulting arc is given by: midPoint = ((startPoint + endPoint)/2.0) + bulge*normal
Diagram
Diagram
Type double
Properties
content: simple
Source
<element name="bulge" type="double">
  <annotation>
    <documentation>The bulge controls the offset of each arc's midpoint. The "bulge" is the real number multiplier for the normal that determines the offset direction of the midpoint of each arc. The length of the bulge sequence is exactly 1 less than the length of the control point array, since a bulge is needed for each pair of adjacent points in the control point array. The bulge is not given by a distance, since it is simply a multiplier for the normal.
The midpoint of the resulting arc is given by: midPoint = ((startPoint + endPoint)/2.0) + bulge*normal</documentation>
  </annotation>
</element>
Element gml:ArcByBulgeType / gml:normal
Namespace http://www.opengis.net/gml
Annotations
The attribute "normal" is a vector normal (perpendicular) to the chord of the arc, the line joining the first and last point of the arc. In a 2D coordinate system, there are only two possible directions for the normal, and it is often given as a signed real, indicating its length, with a positive sign indicating a left turn angle from the chord line, and a negative sign indicating a right turn from the chord. In 3D, the normal determines the plane of the arc, along with the start and endPoint of the arc. The normal is usually a unit vector, but this is not absolutely necessary. If the normal is a zero vector, the geometric object becomes equivalent to the straight line between the two end points. The length of the normal sequence is exactly the same as for the bulge sequence, 1 less than the control point sequence length.
Diagram
Diagram index23.tmp#id774 index6.tmp#id765 index6.tmp#id1250
Type gml:VectorType
Type hierarchy
Properties
content: complex
Attributes
QName Type Fixed Default Use Annotation
axisLabels gml:NCNameList optional
Ordered list of labels for all the axes of this CRS. The gml:axisAbbrev value should be used for these axis labels, after spaces and forbiddden characters are removed. When the srsName attribute is included, this attribute is optional. When the srsName attribute is omitted, this attribute shall also be omitted.
srsDimension positiveInteger optional
The "srsDimension" is the length of coordinate sequence (the number of entries in the list). This dimension is specified by the coordinate reference system. When the srsName attribute is omitted, this attribute shall be omitted.
srsName anyURI optional
In general this reference points to a CRS instance of gml:CoordinateReferenceSystemType (see coordinateReferenceSystems.xsd). For well known references it is not required that the CRS description exists at the location the URI points to. If no srsName attribute is given, the CRS must be specified as part of the larger context this geometry element is part of, e.g. a geometric element like point, curve, etc. It is expected that this attribute will be specified at the direct position level only in rare cases.
uomLabels gml:NCNameList optional
Ordered list of unit of measure (uom) labels for all the axes of this CRS. The value of the string in the gml:catalogSymbol should be used for this uom labels, after spaces and forbiddden characters are removed. When the axisLabels attribute is included, this attribute shall also be included. When the axisLabels attribute is omitted, this attribute shall also be omitted.
Source
<element name="normal" type="gml:VectorType">
  <annotation>
    <documentation>The attribute "normal" is a vector normal (perpendicular) to the chord of the arc, the line joining the first and last
point of the arc. In a 2D coordinate system, there are only two possible directions for the normal, and it is often given as a signed real, indicating its length, with a positive sign indicating a left turn angle from the chord line, and a negative sign indicating a right turn from the chord. In 3D, the normal determines the plane of the arc, along with the start and endPoint of the arc.
The normal is usually a unit vector, but this is not absolutely necessary. If the normal is a zero vector, the geometric object becomes equivalent to the straight line between the two end points. The length of the normal sequence is exactly the same as for the bulge sequence, 1 less than the control point sequence length.</documentation>
  </annotation>
</element>
Element gml:ArcByCenterPoint
Namespace http://www.opengis.net/gml
Diagram
Diagram index5.tmp#id1652 index5.tmp#id1653 index5.tmp#id1654 index5.tmp#id1651 index5.tmp#id1680 index5.tmp#id1681 index6.tmp#id772 index6.tmp#id720 index6.tmp#id791 index6.tmp#id792 index6.tmp#id775 index5.tmp#id1677 index5.tmp#id1678 index5.tmp#id1679 index5.tmp#id1676 index5.tmp#id1643 index5.tmp#id1635
Type gml:ArcByCenterPointType
Type hierarchy
Properties
content: complex
Substitution Group
Substitution Group Affiliation
Model (gml:pos | gml:pointProperty | gml:pointRep | gml:posList | gml:coordinates) , gml:radius , gml:startAngle{0,1} , gml:endAngle{0,1}
Children gml:coordinates, gml:endAngle, gml:pointProperty, gml:pointRep, gml:pos, gml:posList, gml:radius, gml:startAngle
Instance
<gml:ArcByCenterPoint interpolation="circularArcCenterPointWithRadius" numArc="1" numDerivativeInterior="0" numDerivativesAtEnd="0" numDerivativesAtStart="0">
  <gml:pos axisLabels="" srsDimension="" srsName="" uomLabels="">{1,1}</gml:pos>
  <gml:pointProperty xlink:actuate="" xlink:arcrole="" xlink:href="" gml:remoteSchema="" xlink:role="" xlink:show="" xlink:title="" xlink:type="simple">{1,1}</gml:pointProperty>
  <gml:pointRep xlink:actuate="" xlink:arcrole="" xlink:href="" gml:remoteSchema="" xlink:role="" xlink:show="" xlink:title="" xlink:type="simple">{1,1}</gml:pointRep>
  <gml:posList axisLabels="" count="" srsDimension="" srsName="" uomLabels="">{1,1}</gml:posList>
  <gml:coordinates cs="," decimal="." ts=" ">{1,1}</gml:coordinates>
  <gml:radius uom="">{1,1}</gml:radius>
  <gml:startAngle uom="">{0,1}</gml:startAngle>
  <gml:endAngle uom="">{0,1}</gml:endAngle>
</gml:ArcByCenterPoint>
Attributes
QName Type Fixed Default Use Annotation
interpolation gml:CurveInterpolationType circularArcCenterPointWithRadius optional
The attribute "interpolation" specifies the curve interpolation mechanism used for this segment. This mechanism uses the control points and control parameters to determine the position of this curve segment. For an ArcByCenterPoint the interpolation is fixed as "circularArcCenterPointWithRadius".
numArc integer 1 required
Since this type describes always a single arc, the attribute is fixed to "1".
numDerivativeInterior integer 0 optional
The attribute "numDerivativesInterior" specifies the type of continuity that is guaranteed interior to the curve. The default value of "0" means simple continuity, which is a mandatory minimum level of continuity. This level is referred to as "C 0 " in mathematical texts. A value of 1 means that the function and its first derivative are continuous at the appropriate end point: "C 1 " continuity. A value of "n" for any integer means the function and its first n derivatives are continuous: "C n " continuity. NOTE: Use of these values is only appropriate when the basic curve definition is an underdetermined system. For example, line string segments cannot support continuity above C 0 , since there is no spare control parameter to adjust the incoming angle at the end points of the segment. Spline functions on the other hand often have extra degrees of freedom on end segments that allow them to adjust the values of the derivatives to support C 1 or higher continuity.
numDerivativesAtEnd integer 0 optional
The attribute "numDerivativesAtEnd" specifies the type of continuity between this curve segment and its successor. If this is the last curve segment in the curve, one of these values, as appropriate, is ignored. The default value of "0" means simple continuity, which is a mandatory minimum level of continuity. This level is referred to as "C 0 " in mathematical texts. A value of 1 means that the function and its first derivative are continuous at the appropriate end point: "C 1 " continuity. A value of "n" for any integer means the function and its first n derivatives are continuous: "C n " continuity. NOTE: Use of these values is only appropriate when the basic curve definition is an underdetermined system. For example, line string segments cannot support continuity above C 0 , since there is no spare control parameter to adjust the incoming angle at the end points of the segment. Spline functions on the other hand often have extra degrees of freedom on end segments that allow them to adjust the values of the derivatives to support C 1 or higher continuity.
numDerivativesAtStart integer 0 optional
The attribute "numDerivativesAtStart" specifies the type of continuity between this curve segment and its predecessor. If this is the first curve segment in the curve, one of these values, as appropriate, is ignored. The default value of "0" means simple continuity, which is a mandatory minimum level of continuity. This level is referred to as "C 0 " in mathematical texts. A value of 1 means that the function and its first derivative are continuous at the appropriate end point: "C 1 " continuity. A value of "n" for any integer means the function and its first n derivatives are continuous: "C n " continuity. NOTE: Use of these values is only appropriate when the basic curve definition is an underdetermined system. For example, line string segments cannot support continuity above C 0 , since there is no spare control parameter to adjust the incoming angle at the end points of the segment. Spline functions on the other hand often have extra degrees of freedom on end segments that allow them to adjust the values of the derivatives to support C 1 or higher continuity.
Source
<element name="ArcByCenterPoint" type="gml:ArcByCenterPointType" substitutionGroup="gml:_CurveSegment"/>
Element gml:ArcByCenterPointType / gml:radius
Namespace http://www.opengis.net/gml
Annotations
The radius of the arc.
Diagram
Diagram index23.tmp#id1244 index23.tmp#id1243 index13.tmp#id1328
Type gml:LengthType
Type hierarchy
Properties
content: complex
Attributes
QName Type Fixed Default Use Annotation
uom anyURI required
Source
<element name="radius" type="gml:LengthType">
  <annotation>
    <documentation>The radius of the arc.</documentation>
  </annotation>
</element>
Element gml:ArcByCenterPointType / gml:startAngle
Namespace http://www.opengis.net/gml
Annotations
The bearing of the arc at the start.
Diagram
Diagram index23.tmp#id1244 index23.tmp#id1243 index13.tmp#id1252
Type gml:AngleType
Type hierarchy
Properties
content: complex
minOccurs: 0
Attributes
QName Type Fixed Default Use Annotation
uom anyURI required
Source
<element name="startAngle" type="gml:AngleType" minOccurs="0">
  <annotation>
    <documentation>The bearing of the arc at the start.</documentation>
  </annotation>
</element>
Element gml:ArcByCenterPointType / gml:endAngle
Namespace http://www.opengis.net/gml
Annotations
The bearing of the arc at the end.
Diagram
Diagram index23.tmp#id1244 index23.tmp#id1243 index13.tmp#id1252
Type gml:AngleType
Type hierarchy
Properties
content: complex
minOccurs: 0
Attributes
QName Type Fixed Default Use Annotation
uom anyURI required
Source
<element name="endAngle" type="gml:AngleType" minOccurs="0">
  <annotation>
    <documentation>The bearing of the arc at the end.</documentation>
  </annotation>
</element>
Element gml:CircleByCenterPoint
Namespace http://www.opengis.net/gml
Diagram
Diagram index5.tmp#id1652 index5.tmp#id1653 index5.tmp#id1654 index5.tmp#id1651 index5.tmp#id1680 index5.tmp#id1681 index6.tmp#id772 index6.tmp#id720 index6.tmp#id791 index6.tmp#id792 index6.tmp#id775 index5.tmp#id1677 index5.tmp#id1678 index5.tmp#id1679 index5.tmp#id1676 index5.tmp#id1682 index5.tmp#id1642
Type gml:CircleByCenterPointType
Type hierarchy
Properties
content: complex
Substitution Group Affiliation
Model (gml:pos | gml:pointProperty | gml:pointRep | gml:posList | gml:coordinates) , gml:radius , gml:startAngle{0,1} , gml:endAngle{0,1}
Children gml:coordinates, gml:endAngle, gml:pointProperty, gml:pointRep, gml:pos, gml:posList, gml:radius, gml:startAngle
Instance
<gml:CircleByCenterPoint interpolation="circularArcCenterPointWithRadius" numArc="1" numDerivativeInterior="0" numDerivativesAtEnd="0" numDerivativesAtStart="0">
  <gml:pos axisLabels="" srsDimension="" srsName="" uomLabels="">{1,1}</gml:pos>
  <gml:pointProperty xlink:actuate="" xlink:arcrole="" xlink:href="" gml:remoteSchema="" xlink:role="" xlink:show="" xlink:title="" xlink:type="simple">{1,1}</gml:pointProperty>
  <gml:pointRep xlink:actuate="" xlink:arcrole="" xlink:href="" gml:remoteSchema="" xlink:role="" xlink:show="" xlink:title="" xlink:type="simple">{1,1}</gml:pointRep>
  <gml:posList axisLabels="" count="" srsDimension="" srsName="" uomLabels="">{1,1}</gml:posList>
  <gml:coordinates cs="," decimal="." ts=" ">{1,1}</gml:coordinates>
  <gml:radius uom="">{1,1}</gml:radius>
  <gml:startAngle uom="">{0,1}</gml:startAngle>
  <gml:endAngle uom="">{0,1}</gml:endAngle>
</gml:CircleByCenterPoint>
Attributes
QName Type Fixed Default Use Annotation
interpolation gml:CurveInterpolationType circularArcCenterPointWithRadius optional
The attribute "interpolation" specifies the curve interpolation mechanism used for this segment. This mechanism uses the control points and control parameters to determine the position of this curve segment. For an ArcByCenterPoint the interpolation is fixed as "circularArcCenterPointWithRadius".
numArc integer 1 required
Since this type describes always a single arc, the attribute is fixed to "1".
numDerivativeInterior integer 0 optional
The attribute "numDerivativesInterior" specifies the type of continuity that is guaranteed interior to the curve. The default value of "0" means simple continuity, which is a mandatory minimum level of continuity. This level is referred to as "C 0 " in mathematical texts. A value of 1 means that the function and its first derivative are continuous at the appropriate end point: "C 1 " continuity. A value of "n" for any integer means the function and its first n derivatives are continuous: "C n " continuity. NOTE: Use of these values is only appropriate when the basic curve definition is an underdetermined system. For example, line string segments cannot support continuity above C 0 , since there is no spare control parameter to adjust the incoming angle at the end points of the segment. Spline functions on the other hand often have extra degrees of freedom on end segments that allow them to adjust the values of the derivatives to support C 1 or higher continuity.
numDerivativesAtEnd integer 0 optional
The attribute "numDerivativesAtEnd" specifies the type of continuity between this curve segment and its successor. If this is the last curve segment in the curve, one of these values, as appropriate, is ignored. The default value of "0" means simple continuity, which is a mandatory minimum level of continuity. This level is referred to as "C 0 " in mathematical texts. A value of 1 means that the function and its first derivative are continuous at the appropriate end point: "C 1 " continuity. A value of "n" for any integer means the function and its first n derivatives are continuous: "C n " continuity. NOTE: Use of these values is only appropriate when the basic curve definition is an underdetermined system. For example, line string segments cannot support continuity above C 0 , since there is no spare control parameter to adjust the incoming angle at the end points of the segment. Spline functions on the other hand often have extra degrees of freedom on end segments that allow them to adjust the values of the derivatives to support C 1 or higher continuity.
numDerivativesAtStart integer 0 optional
The attribute "numDerivativesAtStart" specifies the type of continuity between this curve segment and its predecessor. If this is the first curve segment in the curve, one of these values, as appropriate, is ignored. The default value of "0" means simple continuity, which is a mandatory minimum level of continuity. This level is referred to as "C 0 " in mathematical texts. A value of 1 means that the function and its first derivative are continuous at the appropriate end point: "C 1 " continuity. A value of "n" for any integer means the function and its first n derivatives are continuous: "C n " continuity. NOTE: Use of these values is only appropriate when the basic curve definition is an underdetermined system. For example, line string segments cannot support continuity above C 0 , since there is no spare control parameter to adjust the incoming angle at the end points of the segment. Spline functions on the other hand often have extra degrees of freedom on end segments that allow them to adjust the values of the derivatives to support C 1 or higher continuity.
Source
<element name="CircleByCenterPoint" type="gml:CircleByCenterPointType" substitutionGroup="gml:ArcByCenterPoint"/>
Element gml:OffsetCurve
Namespace http://www.opengis.net/gml
Diagram
Diagram index5.tmp#id1652 index5.tmp#id1653 index5.tmp#id1654 index5.tmp#id1651 index5.tmp#id1684 index5.tmp#id1685 index5.tmp#id1686 index5.tmp#id1683 index5.tmp#id1635
Type gml:OffsetCurveType
Type hierarchy
Properties
content: complex
Substitution Group Affiliation
Model gml:offsetBase , gml:distance , gml:refDirection{0,1}
Children gml:distance, gml:offsetBase, gml:refDirection
Instance
<gml:OffsetCurve numDerivativeInterior="0" numDerivativesAtEnd="0" numDerivativesAtStart="0">
  <gml:offsetBase xlink:actuate="" xlink:arcrole="" xlink:href="" gml:remoteSchema="" xlink:role="" xlink:show="" xlink:title="" xlink:type="simple">{1,1}</gml:offsetBase>
  <gml:distance uom="">{1,1}</gml:distance>
  <gml:refDirection axisLabels="" srsDimension="" srsName="" uomLabels="">{0,1}</gml:refDirection>
</gml:OffsetCurve>
Attributes
QName Type Fixed Default Use Annotation
numDerivativeInterior integer 0 optional
The attribute "numDerivativesInterior" specifies the type of continuity that is guaranteed interior to the curve. The default value of "0" means simple continuity, which is a mandatory minimum level of continuity. This level is referred to as "C 0 " in mathematical texts. A value of 1 means that the function and its first derivative are continuous at the appropriate end point: "C 1 " continuity. A value of "n" for any integer means the function and its first n derivatives are continuous: "C n " continuity. NOTE: Use of these values is only appropriate when the basic curve definition is an underdetermined system. For example, line string segments cannot support continuity above C 0 , since there is no spare control parameter to adjust the incoming angle at the end points of the segment. Spline functions on the other hand often have extra degrees of freedom on end segments that allow them to adjust the values of the derivatives to support C 1 or higher continuity.
numDerivativesAtEnd integer 0 optional
The attribute "numDerivativesAtEnd" specifies the type of continuity between this curve segment and its successor. If this is the last curve segment in the curve, one of these values, as appropriate, is ignored. The default value of "0" means simple continuity, which is a mandatory minimum level of continuity. This level is referred to as "C 0 " in mathematical texts. A value of 1 means that the function and its first derivative are continuous at the appropriate end point: "C 1 " continuity. A value of "n" for any integer means the function and its first n derivatives are continuous: "C n " continuity. NOTE: Use of these values is only appropriate when the basic curve definition is an underdetermined system. For example, line string segments cannot support continuity above C 0 , since there is no spare control parameter to adjust the incoming angle at the end points of the segment. Spline functions on the other hand often have extra degrees of freedom on end segments that allow them to adjust the values of the derivatives to support C 1 or higher continuity.
numDerivativesAtStart integer 0 optional
The attribute "numDerivativesAtStart" specifies the type of continuity between this curve segment and its predecessor. If this is the first curve segment in the curve, one of these values, as appropriate, is ignored. The default value of "0" means simple continuity, which is a mandatory minimum level of continuity. This level is referred to as "C 0 " in mathematical texts. A value of 1 means that the function and its first derivative are continuous at the appropriate end point: "C 1 " continuity. A value of "n" for any integer means the function and its first n derivatives are continuous: "C n " continuity. NOTE: Use of these values is only appropriate when the basic curve definition is an underdetermined system. For example, line string segments cannot support continuity above C 0 , since there is no spare control parameter to adjust the incoming angle at the end points of the segment. Spline functions on the other hand often have extra degrees of freedom on end segments that allow them to adjust the values of the derivatives to support C 1 or higher continuity.
Source
<element name="OffsetCurve" type="gml:OffsetCurveType" substitutionGroup="gml:_CurveSegment"/>
Element gml:OffsetCurveType / gml:offsetBase
Namespace http://www.opengis.net/gml
Annotations
offsetBase is a reference to thecurve from which this curve is define as an offset.
Diagram
Diagram index2.tmp#id731 index6.tmp#id788 index6.tmp#id1307
Type gml:CurvePropertyType
Properties
content: complex
Model gml:_Curve
Children gml:_Curve
Instance
<gml:offsetBase xlink:actuate="" xlink:arcrole="" xlink:href="" gml:remoteSchema="" xlink:role="" xlink:show="" xlink:title="" xlink:type="simple">
  <gml:_Curve axisLabels="" gid="" gml:id="" srsDimension="" srsName="" uomLabels="">{1,1}</gml:_Curve>
</gml:offsetBase>
Attributes
QName Type Fixed Default Use Annotation
gml:remoteSchema anyURI optional
Reference to an XML Schema fragment that specifies the content model of the propertys value. This is in conformance with the XML Schema Section 4.14 Referencing Schemas from Elsewhere.
xlink:actuate xlink:actuateType optional
xlink:arcrole xlink:arcroleType optional
xlink:href xlink:hrefType optional
xlink:role xlink:roleType optional
xlink:show xlink:showType optional
xlink:title xlink:titleAttrType optional
xlink:type xlink:typeType simple optional
Source
<element name="offsetBase" type="gml:CurvePropertyType">
  <annotation>
    <documentation>offsetBase is a reference to thecurve from which this
							 curve is define	as an offset.</documentation>
  </annotation>
</element>
Element gml:OffsetCurveType / gml:distance
Namespace http://www.opengis.net/gml
Annotations
distance is the distance at which the offset curve is generated from the basis curve. In 2D systems, positive distances are to be to the left of the basis curve, and the negative distances are to be to the right of the basis curve.
Diagram
Diagram index23.tmp#id1244 index23.tmp#id1243 index13.tmp#id1328
Type gml:LengthType
Type hierarchy
Properties
content: complex
Attributes
QName Type Fixed Default Use Annotation
uom anyURI required
Source
<element name="distance" type="gml:LengthType">
  <annotation>
    <documentation>distance is the distance at which the
							 offset curve is generated from the basis curve. In 2D systems, positive distances
							 are to be to the left of the basis curve, and the negative distances are to be to the 
							 right of the basis curve.</documentation>
  </annotation>
</element>
Element gml:OffsetCurveType / gml:refDirection
Namespace http://www.opengis.net/gml
Annotations
refDistance is used to define the vector direction of the offset curve from the basis curve. It can be omitted in the 2D case, where the distance can be positive or negative. In that case, distance defines left side (positive distance) or right side (negative distance) with respect to the tangent to the basis curve. In 3D the basis curve shall have a well defined tangent direction for every point. The offset curve at any point in 3D, the basis curve shall have a well-defined tangent direction for every point. The offset curve at any point (parameter) on the basis curve c is in the direction - - - - s = v x t where v = c.refDirection() and - t = c.tangent() - For the offset direction to be well-defined, v shall not on any point of the curve be in the same, or opposite, direction as - t. The default value of the refDirection shall be the local co-ordinate axis vector for elevation, which indicates up for the curve in a geographic sense. NOTE! If the refDirection is the positive tangent to the local elevation axis ("points upward"), then the offset vector points to the left of the curve when viewed from above.
Diagram
Diagram index23.tmp#id774 index6.tmp#id765 index6.tmp#id1250
Type gml:VectorType
Type hierarchy
Properties
content: complex
minOccurs: 0
Attributes
QName Type Fixed Default Use Annotation
axisLabels gml:NCNameList optional
Ordered list of labels for all the axes of this CRS. The gml:axisAbbrev value should be used for these axis labels, after spaces and forbiddden characters are removed. When the srsName attribute is included, this attribute is optional. When the srsName attribute is omitted, this attribute shall also be omitted.
srsDimension positiveInteger optional
The "srsDimension" is the length of coordinate sequence (the number of entries in the list). This dimension is specified by the coordinate reference system. When the srsName attribute is omitted, this attribute shall be omitted.
srsName anyURI optional
In general this reference points to a CRS instance of gml:CoordinateReferenceSystemType (see coordinateReferenceSystems.xsd). For well known references it is not required that the CRS description exists at the location the URI points to. If no srsName attribute is given, the CRS must be specified as part of the larger context this geometry element is part of, e.g. a geometric element like point, curve, etc. It is expected that this attribute will be specified at the direct position level only in rare cases.
uomLabels gml:NCNameList optional
Ordered list of unit of measure (uom) labels for all the axes of this CRS. The value of the string in the gml:catalogSymbol should be used for this uom labels, after spaces and forbiddden characters are removed. When the axisLabels attribute is included, this attribute shall also be included. When the axisLabels attribute is omitted, this attribute shall also be omitted.
Source
<element name="refDirection" type="gml:VectorType" minOccurs="0">
  <annotation>
    <documentation>refDistance is used to define the vector
       direction of the offset curve from the basis curve. It can
       be omitted in the 2D case, where the distance can be 
       positive or negative. In that case, distance defines left
       side (positive distance) or right side (negative distance)
       with respect to the tangent to the basis curve.

       In 3D the basis curve shall have a well defined tangent 
       direction for every point. The offset curve at any point 
       in 3D, the basis curve shall have a well-defined tangent
       direction for every point. The offset curve at any point
       (parameter) on the basis curve c is in the direction
       -   -   -         -               
       s = v x t  where  v = c.refDirection()  
       and
       -
       t = c.tangent()
                                                    -
       For the offset direction to be well-defined, v shall not
       on any point of the curve be in the same, or opposite, 
       direction as
       - 
       t.

       The default value of the refDirection shall be the local
       co-ordinate axis vector for elevation, which indicates up for
       the curve in a geographic sense.

       NOTE! If the refDirection is the positive tangent to the
       local elevation axis ("points upward"), then the offset
       vector points to the left of the curve when viewed from
       above.</documentation>
  </annotation>
</element>
Element gml:AffinePlacement
Namespace http://www.opengis.net/gml
Diagram
Diagram index5.tmp#id1689 index5.tmp#id1690 index5.tmp#id1691 index5.tmp#id1692 index5.tmp#id1688
Type gml:AffinePlacementType
Properties
content: complex
Used by
Model gml:location , gml:refDirection+ , gml:inDimension , gml:outDimension
Children gml:inDimension, gml:location, gml:outDimension, gml:refDirection
Instance
<gml:AffinePlacement>
  <gml:location axisLabels="" srsDimension="" srsName="" uomLabels="">{1,1}</gml:location>
  <gml:refDirection axisLabels="" srsDimension="" srsName="" uomLabels="">{1,unbounded}</gml:refDirection>
  <gml:inDimension>{1,1}</gml:inDimension>
  <gml:outDimension>{1,1}</gml:outDimension>
</gml:AffinePlacement>
Source
<element name="AffinePlacement" type="gml:AffinePlacementType"/>
Element gml:AffinePlacementType / gml:location
Namespace http://www.opengis.net/gml
Annotations
The location property gives the target of the parameter space origin. This is the vector (x0, y0, z0) in the formulae above.
Diagram
Diagram index23.tmp#id774 index6.tmp#id765 index6.tmp#id773
Type gml:DirectPositionType
Type hierarchy
Properties
content: complex
Attributes
QName Type Fixed Default Use Annotation
axisLabels gml:NCNameList optional
Ordered list of labels for all the axes of this CRS. The gml:axisAbbrev value should be used for these axis labels, after spaces and forbiddden characters are removed. When the srsName attribute is included, this attribute is optional. When the srsName attribute is omitted, this attribute shall also be omitted.
srsDimension positiveInteger optional
The "srsDimension" is the length of coordinate sequence (the number of entries in the list). This dimension is specified by the coordinate reference system. When the srsName attribute is omitted, this attribute shall be omitted.
srsName anyURI optional
In general this reference points to a CRS instance of gml:CoordinateReferenceSystemType (see coordinateReferenceSystems.xsd). For well known references it is not required that the CRS description exists at the location the URI points to. If no srsName attribute is given, the CRS must be specified as part of the larger context this geometry element is part of, e.g. a geometric element like point, curve, etc. It is expected that this attribute will be specified at the direct position level only in rare cases.
uomLabels gml:NCNameList optional
Ordered list of unit of measure (uom) labels for all the axes of this CRS. The value of the string in the gml:catalogSymbol should be used for this uom labels, after spaces and forbiddden characters are removed. When the axisLabels attribute is included, this attribute shall also be included. When the axisLabels attribute is omitted, this attribute shall also be omitted.
Source
<element name="location" type="gml:DirectPositionType">
  <annotation>
    <documentation>The location property gives 
     the target of the parameter space origin. This is the vector  
    (x0, y0, z0) in the formulae above.</documentation>
  </annotation>
</element>
Element gml:AffinePlacementType / gml:refDirection
Namespace http://www.opengis.net/gml
Annotations
The attribute refDirection gives the target directions for the co-ordinate basis vectors of the parameter space. These are the columns of the matrix in the formulae given above. The number of directions given shall be inDimension. The dimension of the directions shall be outDimension.
Diagram
Diagram index23.tmp#id774 index6.tmp#id765 index6.tmp#id1250
Type gml:VectorType
Type hierarchy
Properties
content: complex
maxOccurs: unbounded
Attributes
QName Type Fixed Default Use Annotation
axisLabels gml:NCNameList optional
Ordered list of labels for all the axes of this CRS. The gml:axisAbbrev value should be used for these axis labels, after spaces and forbiddden characters are removed. When the srsName attribute is included, this attribute is optional. When the srsName attribute is omitted, this attribute shall also be omitted.
srsDimension positiveInteger optional
The "srsDimension" is the length of coordinate sequence (the number of entries in the list). This dimension is specified by the coordinate reference system. When the srsName attribute is omitted, this attribute shall be omitted.
srsName anyURI optional
In general this reference points to a CRS instance of gml:CoordinateReferenceSystemType (see coordinateReferenceSystems.xsd). For well known references it is not required that the CRS description exists at the location the URI points to. If no srsName attribute is given, the CRS must be specified as part of the larger context this geometry element is part of, e.g. a geometric element like point, curve, etc. It is expected that this attribute will be specified at the direct position level only in rare cases.
uomLabels gml:NCNameList optional
Ordered list of unit of measure (uom) labels for all the axes of this CRS. The value of the string in the gml:catalogSymbol should be used for this uom labels, after spaces and forbiddden characters are removed. When the axisLabels attribute is included, this attribute shall also be included. When the axisLabels attribute is omitted, this attribute shall also be omitted.
Source
<element name="refDirection" type="gml:VectorType" maxOccurs="unbounded">
  <annotation>
    <documentation>The attribute refDirection gives the    
target directions for the co-ordinate basis vectors of the  
parameter space. These are the columns of the matrix in the 
formulae given above. The number of directions given shall be 
inDimension. The dimension of the directions shall be 
outDimension.</documentation>
  </annotation>
</element>
Element gml:AffinePlacementType / gml:inDimension
Namespace http://www.opengis.net/gml
Annotations
Dimension of the constructive parameter space.
Diagram
Diagram
Type positiveInteger
Properties
content: simple
Source
<element name="inDimension" type="positiveInteger">
  <annotation>
    <documentation>Dimension of the constructive parameter 
     space.</documentation>
  </annotation>
</element>
Element gml:AffinePlacementType / gml:outDimension
Namespace http://www.opengis.net/gml
Annotations
Dimension of the co-ordinate space.
Diagram
Diagram
Type positiveInteger
Properties
content: simple
Source
<element name="outDimension" type="positiveInteger">
  <annotation>
    <documentation>Dimension of the co-ordinate space.</documentation>
  </annotation>
</element>
Element gml:Clothoid
Namespace http://www.opengis.net/gml
Diagram
Diagram index5.tmp#id1652 index5.tmp#id1653 index5.tmp#id1654 index5.tmp#id1651 index5.tmp#id1694 index5.tmp#id1695 index5.tmp#id1696 index5.tmp#id1697 index5.tmp#id1693 index5.tmp#id1635
Type gml:ClothoidType
Type hierarchy
Properties
content: complex
Substitution Group Affiliation
Model gml:refLocation , gml:scaleFactor , gml:startParameter , gml:endParameter
Children gml:endParameter, gml:refLocation, gml:scaleFactor, gml:startParameter
Instance
<gml:Clothoid numDerivativeInterior="0" numDerivativesAtEnd="0" numDerivativesAtStart="0">
  <gml:refLocation>{1,1}</gml:refLocation>
  <gml:scaleFactor>{1,1}</gml:scaleFactor>
  <gml:startParameter>{1,1}</gml:startParameter>
  <gml:endParameter>{1,1}</gml:endParameter>
</gml:Clothoid>
Attributes
QName Type Fixed Default Use Annotation
numDerivativeInterior integer 0 optional
The attribute "numDerivativesInterior" specifies the type of continuity that is guaranteed interior to the curve. The default value of "0" means simple continuity, which is a mandatory minimum level of continuity. This level is referred to as "C 0 " in mathematical texts. A value of 1 means that the function and its first derivative are continuous at the appropriate end point: "C 1 " continuity. A value of "n" for any integer means the function and its first n derivatives are continuous: "C n " continuity. NOTE: Use of these values is only appropriate when the basic curve definition is an underdetermined system. For example, line string segments cannot support continuity above C 0 , since there is no spare control parameter to adjust the incoming angle at the end points of the segment. Spline functions on the other hand often have extra degrees of freedom on end segments that allow them to adjust the values of the derivatives to support C 1 or higher continuity.
numDerivativesAtEnd integer 0 optional
The attribute "numDerivativesAtEnd" specifies the type of continuity between this curve segment and its successor. If this is the last curve segment in the curve, one of these values, as appropriate, is ignored. The default value of "0" means simple continuity, which is a mandatory minimum level of continuity. This level is referred to as "C 0 " in mathematical texts. A value of 1 means that the function and its first derivative are continuous at the appropriate end point: "C 1 " continuity. A value of "n" for any integer means the function and its first n derivatives are continuous: "C n " continuity. NOTE: Use of these values is only appropriate when the basic curve definition is an underdetermined system. For example, line string segments cannot support continuity above C 0 , since there is no spare control parameter to adjust the incoming angle at the end points of the segment. Spline functions on the other hand often have extra degrees of freedom on end segments that allow them to adjust the values of the derivatives to support C 1 or higher continuity.
numDerivativesAtStart integer 0 optional
The attribute "numDerivativesAtStart" specifies the type of continuity between this curve segment and its predecessor. If this is the first curve segment in the curve, one of these values, as appropriate, is ignored. The default value of "0" means simple continuity, which is a mandatory minimum level of continuity. This level is referred to as "C 0 " in mathematical texts. A value of 1 means that the function and its first derivative are continuous at the appropriate end point: "C 1 " continuity. A value of "n" for any integer means the function and its first n derivatives are continuous: "C n " continuity. NOTE: Use of these values is only appropriate when the basic curve definition is an underdetermined system. For example, line string segments cannot support continuity above C 0 , since there is no spare control parameter to adjust the incoming angle at the end points of the segment. Spline functions on the other hand often have extra degrees of freedom on end segments that allow them to adjust the values of the derivatives to support C 1 or higher continuity.
Source
<element name="Clothoid" type="gml:ClothoidType" substitutionGroup="gml:_CurveSegment"/>
Element gml:ClothoidType / gml:refLocation
Namespace http://www.opengis.net/gml
Diagram
Diagram index5.tmp#id1687
Properties
content: complex
Model gml:AffinePlacement
Children gml:AffinePlacement
Instance
<gml:refLocation>
  <gml:AffinePlacement>{1,1}</gml:AffinePlacement>
</gml:refLocation>
Source
<element name="refLocation">
  <complexType>
    <sequence>
      <element ref="gml:AffinePlacement">
        <annotation>
          <documentation>The "refLocation" is an affine mapping 
          that places  the curve defined by the Fresnel Integrals  
          into the co-ordinate reference system of this object.</documentation>
        </annotation>
      </element>
    </sequence>
  </complexType>
</element>
Element gml:ClothoidType / gml:scaleFactor
Namespace http://www.opengis.net/gml
Annotations
The element gives the value for the constant in the Fresnel's integrals.
Diagram
Diagram
Type decimal
Properties
content: simple
Source
<element name="scaleFactor" type="decimal">
  <annotation>
    <documentation>The element gives the value for the
       constant in the Fresnel's integrals.</documentation>
  </annotation>
</element>
Element gml:ClothoidType / gml:startParameter
Namespace http://www.opengis.net/gml
Annotations
The startParameter is the arc length distance from the inflection point that will be the start point for this curve segment. This shall be lower limit used in the Fresnel integral and is the value of the constructive parameter of this curve segment at its start point. The startParameter can either be positive or negative. NOTE! If 0.0 (zero), lies between the startParameter and the endParameter of the clothoid, then the curve goes through the clothoid's inflection point, and the direction of its radius of curvature, given by the second derivative vector, changes sides with respect to the tangent vector. The term length distance for the
Diagram
Diagram
Type double
Properties
content: simple
Source
<element name="startParameter" type="double">
  <annotation>
    <documentation>The startParameter is the arc length
       distance from the inflection point that will be the start
       point for this curve segment. This shall be lower limit
       used in the Fresnel integral and is the value of the
       constructive parameter of this curve segment at its start
       point. The startParameter can either be positive or
       negative. 
       NOTE! If 0.0 (zero), lies between the startParameter and
       the endParameter of the clothoid, then the curve goes
       through the clothoid's inflection point, and the direction
       of its radius of curvature, given by the second
       derivative vector, changes sides with respect to the
       tangent vector. The term length distance for the</documentation>
  </annotation>
</element>
Element gml:ClothoidType / gml:endParameter
Namespace http://www.opengis.net/gml
Annotations
The endParameter is the arc length distance from the inflection point that will be the end point for this curve segment. This shall be upper limit used in the Fresnel integral and is the value of the constructive parameter of this curve segment at its start point. The startParameter can either be positive or negative.
Diagram
Diagram
Type double
Properties
content: simple
Source
<element name="endParameter" type="double">
  <annotation>
    <documentation>The endParameter is the arc length
       distance from the inflection point that will be the end
       point for this curve segment. This shall be upper limit
       used in the Fresnel integral and is the value of the
       constructive parameter of this curve segment at its
       start point. The startParameter can either be positive
       or negative.</documentation>
  </annotation>
</element>
Element gml:GeodesicString
Namespace http://www.opengis.net/gml
Diagram
Diagram index5.tmp#id1652 index5.tmp#id1653 index5.tmp#id1654 index5.tmp#id1651 index5.tmp#id1699 index6.tmp#id792 index6.tmp#id772 index6.tmp#id720 index6.tmp#id1325 index5.tmp#id1698 index5.tmp#id1647 index5.tmp#id1635
Type gml:GeodesicStringType
Type hierarchy
Properties
content: complex
Substitution Group
Substitution Group Affiliation
Model gml:posList | gml:pos | gml:pointProperty
Children gml:pointProperty, gml:pos, gml:posList
Instance
<gml:GeodesicString interpolation="geodesic" numDerivativeInterior="0" numDerivativesAtEnd="0" numDerivativesAtStart="0">
  <gml:posList axisLabels="" count="" srsDimension="" srsName="" uomLabels="">{1,1}</gml:posList>
</gml:GeodesicString>
Attributes
QName Type Fixed Default Use Annotation
interpolation gml:CurveInterpolationType geodesic optional
The attribute "interpolation" specifies the curve interpolation mechanism used for this segment. This mechanism uses the control points and control parameters to determine the position of this curve segment. For an GeodesicString the interpolation is fixed as "geodesic".
numDerivativeInterior integer 0 optional
The attribute "numDerivativesInterior" specifies the type of continuity that is guaranteed interior to the curve. The default value of "0" means simple continuity, which is a mandatory minimum level of continuity. This level is referred to as "C 0 " in mathematical texts. A value of 1 means that the function and its first derivative are continuous at the appropriate end point: "C 1 " continuity. A value of "n" for any integer means the function and its first n derivatives are continuous: "C n " continuity. NOTE: Use of these values is only appropriate when the basic curve definition is an underdetermined system. For example, line string segments cannot support continuity above C 0 , since there is no spare control parameter to adjust the incoming angle at the end points of the segment. Spline functions on the other hand often have extra degrees of freedom on end segments that allow them to adjust the values of the derivatives to support C 1 or higher continuity.
numDerivativesAtEnd integer 0 optional
The attribute "numDerivativesAtEnd" specifies the type of continuity between this curve segment and its successor. If this is the last curve segment in the curve, one of these values, as appropriate, is ignored. The default value of "0" means simple continuity, which is a mandatory minimum level of continuity. This level is referred to as "C 0 " in mathematical texts. A value of 1 means that the function and its first derivative are continuous at the appropriate end point: "C 1 " continuity. A value of "n" for any integer means the function and its first n derivatives are continuous: "C n " continuity. NOTE: Use of these values is only appropriate when the basic curve definition is an underdetermined system. For example, line string segments cannot support continuity above C 0 , since there is no spare control parameter to adjust the incoming angle at the end points of the segment. Spline functions on the other hand often have extra degrees of freedom on end segments that allow them to adjust the values of the derivatives to support C 1 or higher continuity.
numDerivativesAtStart integer 0 optional
The attribute "numDerivativesAtStart" specifies the type of continuity between this curve segment and its predecessor. If this is the first curve segment in the curve, one of these values, as appropriate, is ignored. The default value of "0" means simple continuity, which is a mandatory minimum level of continuity. This level is referred to as "C 0 " in mathematical texts. A value of 1 means that the function and its first derivative are continuous at the appropriate end point: "C 1 " continuity. A value of "n" for any integer means the function and its first n derivatives are continuous: "C n " continuity. NOTE: Use of these values is only appropriate when the basic curve definition is an underdetermined system. For example, line string segments cannot support continuity above C 0 , since there is no spare control parameter to adjust the incoming angle at the end points of the segment. Spline functions on the other hand often have extra degrees of freedom on end segments that allow them to adjust the values of the derivatives to support C 1 or higher continuity.
Source
<element name="GeodesicString" type="gml:GeodesicStringType" substitutionGroup="gml:_CurveSegment"/>
Element gml:Geodesic
Namespace http://www.opengis.net/gml
Diagram
Diagram index5.tmp#id1652 index5.tmp#id1653 index5.tmp#id1654 index5.tmp#id1651 index5.tmp#id1699 index6.tmp#id792 index6.tmp#id772 index6.tmp#id720 index6.tmp#id1325 index5.tmp#id1698 index5.tmp#id1700 index5.tmp#id1646
Type gml:GeodesicType
Type hierarchy
Properties
content: complex
Substitution Group Affiliation
Model gml:posList | gml:pos | gml:pointProperty
Children gml:pointProperty, gml:pos, gml:posList
Instance
<gml:Geodesic interpolation="geodesic" numDerivativeInterior="0" numDerivativesAtEnd="0" numDerivativesAtStart="0">
  <gml:posList axisLabels="" count="" srsDimension="" srsName="" uomLabels="">{1,1}</gml:posList>
</gml:Geodesic>
Attributes
QName Type Fixed Default Use Annotation
interpolation gml:CurveInterpolationType geodesic optional
The attribute "interpolation" specifies the curve interpolation mechanism used for this segment. This mechanism uses the control points and control parameters to determine the position of this curve segment. For an GeodesicString the interpolation is fixed as "geodesic".
numDerivativeInterior integer 0 optional
The attribute "numDerivativesInterior" specifies the type of continuity that is guaranteed interior to the curve. The default value of "0" means simple continuity, which is a mandatory minimum level of continuity. This level is referred to as "C 0 " in mathematical texts. A value of 1 means that the function and its first derivative are continuous at the appropriate end point: "C 1 " continuity. A value of "n" for any integer means the function and its first n derivatives are continuous: "C n " continuity. NOTE: Use of these values is only appropriate when the basic curve definition is an underdetermined system. For example, line string segments cannot support continuity above C 0 , since there is no spare control parameter to adjust the incoming angle at the end points of the segment. Spline functions on the other hand often have extra degrees of freedom on end segments that allow them to adjust the values of the derivatives to support C 1 or higher continuity.
numDerivativesAtEnd integer 0 optional
The attribute "numDerivativesAtEnd" specifies the type of continuity between this curve segment and its successor. If this is the last curve segment in the curve, one of these values, as appropriate, is ignored. The default value of "0" means simple continuity, which is a mandatory minimum level of continuity. This level is referred to as "C 0 " in mathematical texts. A value of 1 means that the function and its first derivative are continuous at the appropriate end point: "C 1 " continuity. A value of "n" for any integer means the function and its first n derivatives are continuous: "C n " continuity. NOTE: Use of these values is only appropriate when the basic curve definition is an underdetermined system. For example, line string segments cannot support continuity above C 0 , since there is no spare control parameter to adjust the incoming angle at the end points of the segment. Spline functions on the other hand often have extra degrees of freedom on end segments that allow them to adjust the values of the derivatives to support C 1 or higher continuity.
numDerivativesAtStart integer 0 optional
The attribute "numDerivativesAtStart" specifies the type of continuity between this curve segment and its predecessor. If this is the first curve segment in the curve, one of these values, as appropriate, is ignored. The default value of "0" means simple continuity, which is a mandatory minimum level of continuity. This level is referred to as "C 0 " in mathematical texts. A value of 1 means that the function and its first derivative are continuous at the appropriate end point: "C 1 " continuity. A value of "n" for any integer means the function and its first n derivatives are continuous: "C n " continuity. NOTE: Use of these values is only appropriate when the basic curve definition is an underdetermined system. For example, line string segments cannot support continuity above C 0 , since there is no spare control parameter to adjust the incoming angle at the end points of the segment. Spline functions on the other hand often have extra degrees of freedom on end segments that allow them to adjust the values of the derivatives to support C 1 or higher continuity.
Source
<element name="Geodesic" type="gml:GeodesicType" substitutionGroup="gml:GeodesicString"/>
Element gml:CubicSpline
Namespace http://www.opengis.net/gml
Diagram
Diagram index5.tmp#id1652 index5.tmp#id1653 index5.tmp#id1654 index5.tmp#id1651 index5.tmp#id1704 index5.tmp#id1705 index6.tmp#id772 index6.tmp#id720 index6.tmp#id791 index6.tmp#id792 index6.tmp#id775 index5.tmp#id1702 index5.tmp#id1703 index5.tmp#id1701 index5.tmp#id1635
Type gml:CubicSplineType
Type hierarchy
Properties
content: complex
Substitution Group Affiliation
Model (gml:pos | gml:pointProperty | gml:pointRep | gml:posList | gml:coordinates) , gml:vectorAtStart , gml:vectorAtEnd
Children gml:coordinates, gml:pointProperty, gml:pointRep, gml:pos, gml:posList, gml:vectorAtEnd, gml:vectorAtStart
Instance
<gml:CubicSpline degree="3" interpolation="cubicSpline" numDerivativeInterior="0" numDerivativesAtEnd="0" numDerivativesAtStart="0">
  <gml:pos axisLabels="" srsDimension="" srsName="" uomLabels="">{1,1}</gml:pos>
  <gml:pointProperty xlink:actuate="" xlink:arcrole="" xlink:href="" gml:remoteSchema="" xlink:role="" xlink:show="" xlink:title="" xlink:type="simple">{1,1}</gml:pointProperty>
  <gml:pointRep xlink:actuate="" xlink:arcrole="" xlink:href="" gml:remoteSchema="" xlink:role="" xlink:show="" xlink:title="" xlink:type="simple">{1,1}</gml:pointRep>
  <gml:posList axisLabels="" count="" srsDimension="" srsName="" uomLabels="">{1,1}</gml:posList>
  <gml:coordinates cs="," decimal="." ts=" ">{1,1}</gml:coordinates>
  <gml:vectorAtStart axisLabels="" srsDimension="" srsName="" uomLabels="">{1,1}</gml:vectorAtStart>
  <gml:vectorAtEnd axisLabels="" srsDimension="" srsName="" uomLabels="">{1,1}</gml:vectorAtEnd>
</gml:CubicSpline>
Attributes
QName Type Fixed Default Use Annotation
degree integer 3 optional
The degree for a cubic spline is "3".
interpolation gml:CurveInterpolationType cubicSpline optional
The attribute "interpolation" specifies the curve interpolation mechanism used for this segment. This mechanism uses the control points and control parameters to determine the position of this curve segment. For a CubicSpline the interpolation is fixed as "cubicSpline".
numDerivativeInterior integer 0 optional
The attribute "numDerivativesInterior" specifies the type of continuity that is guaranteed interior to the curve. The default value of "0" means simple continuity, which is a mandatory minimum level of continuity. This level is referred to as "C 0 " in mathematical texts. A value of 1 means that the function and its first derivative are continuous at the appropriate end point: "C 1 " continuity. A value of "n" for any integer means the function and its first n derivatives are continuous: "C n " continuity. NOTE: Use of these values is only appropriate when the basic curve definition is an underdetermined system. For example, line string segments cannot support continuity above C 0 , since there is no spare control parameter to adjust the incoming angle at the end points of the segment. Spline functions on the other hand often have extra degrees of freedom on end segments that allow them to adjust the values of the derivatives to support C 1 or higher continuity.
numDerivativesAtEnd integer 0 optional
The attribute "numDerivativesAtEnd" specifies the type of continuity between this curve segment and its successor. If this is the last curve segment in the curve, one of these values, as appropriate, is ignored. The default value of "0" means simple continuity, which is a mandatory minimum level of continuity. This level is referred to as "C 0 " in mathematical texts. A value of 1 means that the function and its first derivative are continuous at the appropriate end point: "C 1 " continuity. A value of "n" for any integer means the function and its first n derivatives are continuous: "C n " continuity. NOTE: Use of these values is only appropriate when the basic curve definition is an underdetermined system. For example, line string segments cannot support continuity above C 0 , since there is no spare control parameter to adjust the incoming angle at the end points of the segment. Spline functions on the other hand often have extra degrees of freedom on end segments that allow them to adjust the values of the derivatives to support C 1 or higher continuity.
numDerivativesAtStart integer 0 optional
The attribute "numDerivativesAtStart" specifies the type of continuity between this curve segment and its predecessor. If this is the first curve segment in the curve, one of these values, as appropriate, is ignored. The default value of "0" means simple continuity, which is a mandatory minimum level of continuity. This level is referred to as "C 0 " in mathematical texts. A value of 1 means that the function and its first derivative are continuous at the appropriate end point: "C 1 " continuity. A value of "n" for any integer means the function and its first n derivatives are continuous: "C n " continuity. NOTE: Use of these values is only appropriate when the basic curve definition is an underdetermined system. For example, line string segments cannot support continuity above C 0 , since there is no spare control parameter to adjust the incoming angle at the end points of the segment. Spline functions on the other hand often have extra degrees of freedom on end segments that allow them to adjust the values of the derivatives to support C 1 or higher continuity.
Source
<element name="CubicSpline" type="gml:CubicSplineType" substitutionGroup="gml:_CurveSegment"/>
Element gml:CubicSplineType / gml:vectorAtStart
Namespace http://www.opengis.net/gml
Annotations
"vectorAtStart" is the unit tangent vector at the start point of the spline.
Diagram
Diagram index23.tmp#id774 index6.tmp#id765 index6.tmp#id1250
Type gml:VectorType
Type hierarchy
Properties
content: complex
Attributes
QName Type Fixed Default Use Annotation
axisLabels gml:NCNameList optional
Ordered list of labels for all the axes of this CRS. The gml:axisAbbrev value should be used for these axis labels, after spaces and forbiddden characters are removed. When the srsName attribute is included, this attribute is optional. When the srsName attribute is omitted, this attribute shall also be omitted.
srsDimension positiveInteger optional
The "srsDimension" is the length of coordinate sequence (the number of entries in the list). This dimension is specified by the coordinate reference system. When the srsName attribute is omitted, this attribute shall be omitted.
srsName anyURI optional
In general this reference points to a CRS instance of gml:CoordinateReferenceSystemType (see coordinateReferenceSystems.xsd). For well known references it is not required that the CRS description exists at the location the URI points to. If no srsName attribute is given, the CRS must be specified as part of the larger context this geometry element is part of, e.g. a geometric element like point, curve, etc. It is expected that this attribute will be specified at the direct position level only in rare cases.
uomLabels gml:NCNameList optional
Ordered list of unit of measure (uom) labels for all the axes of this CRS. The value of the string in the gml:catalogSymbol should be used for this uom labels, after spaces and forbiddden characters are removed. When the axisLabels attribute is included, this attribute shall also be included. When the axisLabels attribute is omitted, this attribute shall also be omitted.
Source
<element name="vectorAtStart" type="gml:VectorType">
  <annotation>
    <documentation>"vectorAtStart" is the unit tangent vector at the start point of the spline.</documentation>
  </annotation>
</element>
Element gml:CubicSplineType / gml:vectorAtEnd
Namespace http://www.opengis.net/gml
Annotations
"vectorAtEnd" is the unit tangent vector at the end point of the spline.
Diagram
Diagram index23.tmp#id774 index6.tmp#id765 index6.tmp#id1250
Type gml:VectorType
Type hierarchy
Properties
content: complex
Attributes
QName Type Fixed Default Use Annotation
axisLabels gml:NCNameList optional
Ordered list of labels for all the axes of this CRS. The gml:axisAbbrev value should be used for these axis labels, after spaces and forbiddden characters are removed. When the srsName attribute is included, this attribute is optional. When the srsName attribute is omitted, this attribute shall also be omitted.
srsDimension positiveInteger optional
The "srsDimension" is the length of coordinate sequence (the number of entries in the list). This dimension is specified by the coordinate reference system. When the srsName attribute is omitted, this attribute shall be omitted.
srsName anyURI optional
In general this reference points to a CRS instance of gml:CoordinateReferenceSystemType (see coordinateReferenceSystems.xsd). For well known references it is not required that the CRS description exists at the location the URI points to. If no srsName attribute is given, the CRS must be specified as part of the larger context this geometry element is part of, e.g. a geometric element like point, curve, etc. It is expected that this attribute will be specified at the direct position level only in rare cases.
uomLabels gml:NCNameList optional
Ordered list of unit of measure (uom) labels for all the axes of this CRS. The value of the string in the gml:catalogSymbol should be used for this uom labels, after spaces and forbiddden characters are removed. When the axisLabels attribute is included, this attribute shall also be included. When the axisLabels attribute is omitted, this attribute shall also be omitted.
Source
<element name="vectorAtEnd" type="gml:VectorType">
  <annotation>
    <documentation>"vectorAtEnd" is the unit tangent vector at the end point of the spline.</documentation>
  </annotation>
</element>
Element gml:KnotType / gml:value
Namespace http://www.opengis.net/gml
Annotations
The property "value" is the value of the parameter at the knot of the spline. The sequence of knots shall be a non-decreasing sequence. That is, each knot's value in the sequence shall be equal to or greater than the previous knot's value. The use of equal consecutive knots is normally handled using the multiplicity.
Diagram
Diagram
Type double
Properties
content: simple
Source
<element name="value" type="double">
  <annotation>
    <documentation>The property "value" is the value of the parameter at the knot of the spline. The sequence of knots shall be a non-decreasing sequence. That is, each knot's value in the sequence shall be equal to or greater than the previous knot's value. The use of equal consecutive knots is normally handled using the multiplicity.</documentation>
  </annotation>
</element>
Element gml:KnotType / gml:multiplicity
Namespace http://www.opengis.net/gml
Annotations
The property "multiplicity" is the multiplicity of this knot used in the definition of the spline (with the same weight).
Diagram
Diagram
Type nonNegativeInteger
Properties
content: simple
Source
<element name="multiplicity" type="nonNegativeInteger">
  <annotation>
    <documentation>The property "multiplicity" is the multiplicity of this knot used in the definition of the spline (with the same weight).</documentation>
  </annotation>
</element>
Element gml:KnotType / gml:weight
Namespace http://www.opengis.net/gml
Annotations
The property "weight" is the value of the averaging weight used for this knot of the spline.
Diagram
Diagram
Type double
Properties
content: simple
Source
<element name="weight" type="double">
  <annotation>
    <documentation>The property "weight" is the value of the averaging weight used for this knot of the spline.</documentation>
  </annotation>
</element>
Element gml:KnotPropertyType / gml:Knot
Namespace http://www.opengis.net/gml
Diagram
Diagram index5.tmp#id1707 index5.tmp#id1708 index5.tmp#id1709 index5.tmp#id1706
Type gml:KnotType
Properties
content: complex
Model gml:value , gml:multiplicity , gml:weight
Children gml:multiplicity, gml:value, gml:weight
Instance
<gml:Knot>
  <gml:value>{1,1}</gml:value>
  <gml:multiplicity>{1,1}</gml:multiplicity>
  <gml:weight>{1,1}</gml:weight>
</gml:Knot>
Source
<element name="Knot" type="gml:KnotType"/>
Element gml:BSpline
Namespace http://www.opengis.net/gml
Diagram
Diagram index5.tmp#id1652 index5.tmp#id1653 index5.tmp#id1654 index5.tmp#id1651 index5.tmp#id1715 index5.tmp#id1716 index5.tmp#id1717 index6.tmp#id772 index6.tmp#id720 index6.tmp#id791 index6.tmp#id792 index6.tmp#id775 index5.tmp#id1713 index5.tmp#id1714 index5.tmp#id1712 index5.tmp#id1650 index5.tmp#id1635
Type gml:BSplineType
Type hierarchy
Properties
content: complex
Substitution Group
Substitution Group Affiliation
Model (gml:pos | gml:pointProperty | gml:pointRep | gml:posList | gml:coordinates) , gml:degree , gml:knot{2,unbounded}
Children gml:coordinates, gml:degree, gml:knot, gml:pointProperty, gml:pointRep, gml:pos, gml:posList
Instance
<gml:BSpline interpolation="polynomialSpline" isPolynomial="" knotType="" numDerivativeInterior="0" numDerivativesAtEnd="0" numDerivativesAtStart="0">
  <gml:pos axisLabels="" srsDimension="" srsName="" uomLabels="">{1,1}</gml:pos>
  <gml:pointProperty xlink:actuate="" xlink:arcrole="" xlink:href="" gml:remoteSchema="" xlink:role="" xlink:show="" xlink:title="" xlink:type="simple">{1,1}</gml:pointProperty>
  <gml:pointRep xlink:actuate="" xlink:arcrole="" xlink:href="" gml:remoteSchema="" xlink:role="" xlink:show="" xlink:title="" xlink:type="simple">{1,1}</gml:pointRep>
  <gml:posList axisLabels="" count="" srsDimension="" srsName="" uomLabels="">{1,1}</gml:posList>
  <gml:coordinates cs="," decimal="." ts=" ">{1,1}</gml:coordinates>
  <gml:degree>{1,1}</gml:degree>
  <gml:knot>{2,unbounded}</gml:knot>
</gml:BSpline>
Attributes
QName Type Fixed Default Use Annotation
interpolation gml:CurveInterpolationType polynomialSpline optional
The attribute "interpolation" specifies the curve interpolation mechanism used for this segment. This mechanism uses the control points and control parameters to determine the position of this curve segment. For a BSpline the interpolation can be either "polynomialSpline" or "rationalSpline", default is "polynomialSpline".
isPolynomial boolean optional
The attribute isPolynomial is set to true if this is a polynomial spline.
knotType gml:KnotTypesType optional
The attribute "knotType" gives the type of knot distribution used in defining this spline. This is for information only and is set according to the different construction-functions.
numDerivativeInterior integer 0 optional
The attribute "numDerivativesInterior" specifies the type of continuity that is guaranteed interior to the curve. The default value of "0" means simple continuity, which is a mandatory minimum level of continuity. This level is referred to as "C 0 " in mathematical texts. A value of 1 means that the function and its first derivative are continuous at the appropriate end point: "C 1 " continuity. A value of "n" for any integer means the function and its first n derivatives are continuous: "C n " continuity. NOTE: Use of these values is only appropriate when the basic curve definition is an underdetermined system. For example, line string segments cannot support continuity above C 0 , since there is no spare control parameter to adjust the incoming angle at the end points of the segment. Spline functions on the other hand often have extra degrees of freedom on end segments that allow them to adjust the values of the derivatives to support C 1 or higher continuity.
numDerivativesAtEnd integer 0 optional
The attribute "numDerivativesAtEnd" specifies the type of continuity between this curve segment and its successor. If this is the last curve segment in the curve, one of these values, as appropriate, is ignored. The default value of "0" means simple continuity, which is a mandatory minimum level of continuity. This level is referred to as "C 0 " in mathematical texts. A value of 1 means that the function and its first derivative are continuous at the appropriate end point: "C 1 " continuity. A value of "n" for any integer means the function and its first n derivatives are continuous: "C n " continuity. NOTE: Use of these values is only appropriate when the basic curve definition is an underdetermined system. For example, line string segments cannot support continuity above C 0 , since there is no spare control parameter to adjust the incoming angle at the end points of the segment. Spline functions on the other hand often have extra degrees of freedom on end segments that allow them to adjust the values of the derivatives to support C 1 or higher continuity.
numDerivativesAtStart integer 0 optional
The attribute "numDerivativesAtStart" specifies the type of continuity between this curve segment and its predecessor. If this is the first curve segment in the curve, one of these values, as appropriate, is ignored. The default value of "0" means simple continuity, which is a mandatory minimum level of continuity. This level is referred to as "C 0 " in mathematical texts. A value of 1 means that the function and its first derivative are continuous at the appropriate end point: "C 1 " continuity. A value of "n" for any integer means the function and its first n derivatives are continuous: "C n " continuity. NOTE: Use of these values is only appropriate when the basic curve definition is an underdetermined system. For example, line string segments cannot support continuity above C 0 , since there is no spare control parameter to adjust the incoming angle at the end points of the segment. Spline functions on the other hand often have extra degrees of freedom on end segments that allow them to adjust the values of the derivatives to support C 1 or higher continuity.
Source
<element name="BSpline" type="gml:BSplineType" substitutionGroup="gml:_CurveSegment"/>
Element gml:BSplineType / gml:degree
Namespace http://www.opengis.net/gml
Annotations
The attribute "degree" shall be the degree of the polynomial used for interpolation in this spline.
Diagram
Diagram
Type nonNegativeInteger
Properties
content: simple
Source
<element name="degree" type="nonNegativeInteger">
  <annotation>
    <documentation>The attribute "degree" shall be the degree of the polynomial used for interpolation in this spline.</documentation>
  </annotation>
</element>
Element gml:BSplineType / gml:knot
Namespace http://www.opengis.net/gml
Annotations
The property "knot" shall be the sequence of distinct knots used to define the spline basis functions.
Diagram
Diagram index5.tmp#id1711 index5.tmp#id1710
Type gml:KnotPropertyType
Properties
content: complex
minOccurs: 2
maxOccurs: unbounded
Model gml:Knot
Children gml:Knot
Instance
<gml:knot>
  <gml:Knot>{1,1}</gml:Knot>
</gml:knot>
Source
<element name="knot" type="gml:KnotPropertyType" minOccurs="2" maxOccurs="unbounded">
  <annotation>
    <documentation>The property "knot" shall be the sequence of distinct knots used to define the spline basis functions.</documentation>
  </annotation>
</element>
Element gml:Bezier
Namespace http://www.opengis.net/gml
Diagram
Diagram index5.tmp#id1652 index5.tmp#id1653 index5.tmp#id1654 index5.tmp#id1651 index5.tmp#id1715 index5.tmp#id1716 index5.tmp#id1717 index6.tmp#id772 index6.tmp#id720 index6.tmp#id791 index6.tmp#id792 index6.tmp#id775 index5.tmp#id1713 index5.tmp#id1714 index5.tmp#id1712 index5.tmp#id1722 index5.tmp#id1723 index5.tmp#id1724 index6.tmp#id772 index6.tmp#id720 index6.tmp#id791 index6.tmp#id792 index6.tmp#id775 index5.tmp#id1720 index5.tmp#id1721 index5.tmp#id1719 index5.tmp#id1649
Type gml:BezierType
Type hierarchy
Properties
content: complex
Substitution Group Affiliation
Model (gml:pos | gml:pointProperty | gml:pointRep | gml:posList | gml:coordinates) , gml:degree , gml:knot{2,2}
Children gml:coordinates, gml:degree, gml:knot, gml:pointProperty, gml:pointRep, gml:pos, gml:posList
Instance
<gml:Bezier interpolation="polynomialSpline" isPolynomial="true" numDerivativeInterior="0" numDerivativesAtEnd="0" numDerivativesAtStart="0">
  <gml:pos axisLabels="" srsDimension="" srsName="" uomLabels="">{1,1}</gml:pos>
  <gml:pointProperty xlink:actuate="" xlink:arcrole="" xlink:href="" gml:remoteSchema="" xlink:role="" xlink:show="" xlink:title="" xlink:type="simple">{1,1}</gml:pointProperty>
  <gml:pointRep xlink:actuate="" xlink:arcrole="" xlink:href="" gml:remoteSchema="" xlink:role="" xlink:show="" xlink:title="" xlink:type="simple">{1,1}</gml:pointRep>
  <gml:posList axisLabels="" count="" srsDimension="" srsName="" uomLabels="">{1,1}</gml:posList>
  <gml:coordinates cs="," decimal="." ts=" ">{1,1}</gml:coordinates>
  <gml:degree>{1,1}</gml:degree>
  <gml:knot>{2,2}</gml:knot>
</gml:Bezier>
Attributes
QName Type Fixed Default Use Annotation
interpolation gml:CurveInterpolationType polynomialSpline optional
The attribute "interpolation" specifies the curve interpolation mechanism used for this segment. This mechanism uses the control points and control parameters to determine the position of this curve segment. For a Bezier the interpolation is fixed as "polynomialSpline".
isPolynomial boolean true optional
The attribute isPolynomial is set to true as this is a polynomial spline.
numDerivativeInterior integer 0 optional
The attribute "numDerivativesInterior" specifies the type of continuity that is guaranteed interior to the curve. The default value of "0" means simple continuity, which is a mandatory minimum level of continuity. This level is referred to as "C 0 " in mathematical texts. A value of 1 means that the function and its first derivative are continuous at the appropriate end point: "C 1 " continuity. A value of "n" for any integer means the function and its first n derivatives are continuous: "C n " continuity. NOTE: Use of these values is only appropriate when the basic curve definition is an underdetermined system. For example, line string segments cannot support continuity above C 0 , since there is no spare control parameter to adjust the incoming angle at the end points of the segment. Spline functions on the other hand often have extra degrees of freedom on end segments that allow them to adjust the values of the derivatives to support C 1 or higher continuity.
numDerivativesAtEnd integer 0 optional
The attribute "numDerivativesAtEnd" specifies the type of continuity between this curve segment and its successor. If this is the last curve segment in the curve, one of these values, as appropriate, is ignored. The default value of "0" means simple continuity, which is a mandatory minimum level of continuity. This level is referred to as "C 0 " in mathematical texts. A value of 1 means that the function and its first derivative are continuous at the appropriate end point: "C 1 " continuity. A value of "n" for any integer means the function and its first n derivatives are continuous: "C n " continuity. NOTE: Use of these values is only appropriate when the basic curve definition is an underdetermined system. For example, line string segments cannot support continuity above C 0 , since there is no spare control parameter to adjust the incoming angle at the end points of the segment. Spline functions on the other hand often have extra degrees of freedom on end segments that allow them to adjust the values of the derivatives to support C 1 or higher continuity.
numDerivativesAtStart integer 0 optional
The attribute "numDerivativesAtStart" specifies the type of continuity between this curve segment and its predecessor. If this is the first curve segment in the curve, one of these values, as appropriate, is ignored. The default value of "0" means simple continuity, which is a mandatory minimum level of continuity. This level is referred to as "C 0 " in mathematical texts. A value of 1 means that the function and its first derivative are continuous at the appropriate end point: "C 1 " continuity. A value of "n" for any integer means the function and its first n derivatives are continuous: "C n " continuity. NOTE: Use of these values is only appropriate when the basic curve definition is an underdetermined system. For example, line string segments cannot support continuity above C 0 , since there is no spare control parameter to adjust the incoming angle at the end points of the segment. Spline functions on the other hand often have extra degrees of freedom on end segments that allow them to adjust the values of the derivatives to support C 1 or higher continuity.
Source
<element name="Bezier" type="gml:BezierType" substitutionGroup="gml:BSpline"/>
Element gml:BezierType / gml:degree
Namespace http://www.opengis.net/gml
Annotations
The attribute "degree" shall be the degree of the polynomial used for interpolation in this spline.
Diagram
Diagram
Type nonNegativeInteger
Properties
content: simple
Source
<element name="degree" type="nonNegativeInteger">
  <annotation>
    <documentation>The attribute "degree" shall be the degree of the polynomial used for interpolation in this spline.</documentation>
  </annotation>
</element>
Element gml:BezierType / gml:knot
Namespace http://www.opengis.net/gml
Annotations
The property "knot" shall be the sequence of distinct knots used to define the spline basis functions.
Diagram
Diagram index5.tmp#id1711 index5.tmp#id1710
Type gml:KnotPropertyType
Properties
content: complex
minOccurs: 2
maxOccurs: 2
Model gml:Knot
Children gml:Knot
Instance
<gml:knot>
  <gml:Knot>{1,1}</gml:Knot>
</gml:knot>
Source
<element name="knot" type="gml:KnotPropertyType" minOccurs="2" maxOccurs="2">
  <annotation>
    <documentation>The property "knot" shall be the sequence of distinct knots used to define the spline basis functions.</documentation>
  </annotation>
</element>
Element gml:Surface
Namespace http://www.opengis.net/gml
Diagram
Diagram index2.tmp#id763 index2.tmp#id729 index2.tmp#id749 index2.tmp#id751 index2.tmp#id728 index2.tmp#id727 index6.tmp#id764 index6.tmp#id765 index6.tmp#id726 index6.tmp#id725 index32.tmp#id803 index5.tmp#id1726 index5.tmp#id1725 index5.tmp#id827 index5.tmp#id828 index32.tmp#id801
Type gml:SurfaceType
Type hierarchy
Properties
content: complex
Substitution Group
Substitution Group Affiliation
Model gml:metaDataProperty* , gml:description{0,1} , gml:name* , gml:patches
Children gml:description, gml:metaDataProperty, gml:name, gml:patches
Instance
<gml:Surface axisLabels="" gid="" gml:id="" srsDimension="" srsName="" uomLabels="">
  <gml:metaDataProperty about="" xlink:actuate="" xlink:arcrole="" xlink:href="" gml:remoteSchema="" xlink:role="" xlink:show="" xlink:title="" xlink:type="simple">{0,unbounded}</gml:metaDataProperty>
  <gml:description xlink:actuate="" xlink:arcrole="" xlink:href="" gml:remoteSchema="" xlink:role="" xlink:show="" xlink:title="" xlink:type="simple">{0,1}</gml:description>
  <gml:name codeSpace="">{0,unbounded}</gml:name>
</gml:Surface>
Attributes
QName Type Fixed Default Use Annotation
axisLabels gml:NCNameList optional
Ordered list of labels for all the axes of this CRS. The gml:axisAbbrev value should be used for these axis labels, after spaces and forbiddden characters are removed. When the srsName attribute is included, this attribute is optional. When the srsName attribute is omitted, this attribute shall also be omitted.
gid string optional
This attribute is included for backward compatibility with GML 2 and is deprecated with GML 3. This identifer is superceded by "gml:id" inherited from AbstractGMLType. The attribute "gid" should not be used anymore and may be deleted in future versions of GML without further notice.
gml:id ID optional
Database handle for the object. It is of XML type ID, so is constrained to be unique in the XML document within which it occurs. An external identifier for the object in the form of a URI may be constructed using standard XML and XPointer methods. This is done by concatenating the URI for the document, a fragment separator, and the value of the id attribute.
srsDimension positiveInteger optional
The "srsDimension" is the length of coordinate sequence (the number of entries in the list). This dimension is specified by the coordinate reference system. When the srsName attribute is omitted, this attribute shall be omitted.
srsName anyURI optional
In general this reference points to a CRS instance of gml:CoordinateReferenceSystemType (see coordinateReferenceSystems.xsd). For well known references it is not required that the CRS description exists at the location the URI points to. If no srsName attribute is given, the CRS must be specified as part of the larger context this geometry element is part of, e.g. a geometric element like point, curve, etc. It is expected that this attribute will be specified at the direct position level only in rare cases.
uomLabels gml:NCNameList optional
Ordered list of unit of measure (uom) labels for all the axes of this CRS. The value of the string in the gml:catalogSymbol should be used for this uom labels, after spaces and forbiddden characters are removed. When the axisLabels attribute is included, this attribute shall also be included. When the axisLabels attribute is omitted, this attribute shall also be omitted.
Source
<element name="Surface" type="gml:SurfaceType" substitutionGroup="gml:_Surface"/>
Element gml:patches
Namespace http://www.opengis.net/gml
Annotations
This property element contains a list of surface patches. The order of the elements is significant and shall be preserved when processing the array.
Diagram
Diagram index5.tmp#id1730 index5.tmp#id1729 index5.tmp#id1727 index5.tmp#id1728
Type gml:SurfacePatchArrayPropertyType
Properties
content: complex
Substitution Group
Used by
Complex Type gml:SurfaceType
Model gml:_SurfacePatch
Children gml:_SurfacePatch
Instance
<gml:patches>
  <gml:_SurfacePatch>{1,1}</gml:_SurfacePatch>
</gml:patches>
Source
<element name="patches" type="gml:SurfacePatchArrayPropertyType">
  <annotation>
    <documentation>This property element contains a list of surface patches. The order of the elements is significant and shall be preserved when processing the array.</documentation>
  </annotation>
</element>
Element gml:_SurfacePatch
Namespace http://www.opengis.net/gml
Annotations
The "_SurfacePatch" element is the abstract head of the substituition group for all surface pach elements describing a continuous portion of a surface.
Diagram
Diagram index5.tmp#id1737 index5.tmp#id1731 index5.tmp#id1733 index5.tmp#id1732 index5.tmp#id1752
Type gml:AbstractSurfacePatchType
Properties
content: complex
abstract: true
Substitution Group
Used by
Model
Source
<element name="_SurfacePatch" type="gml:AbstractSurfacePatchType" abstract="true">
  <annotation>
    <documentation>The "_SurfacePatch" element is the abstract head of the substituition group for all surface pach elements describing a continuous portion of a surface.</documentation>
  </annotation>
</element>
Element gml:baseSurface
Namespace http://www.opengis.net/gml
Annotations
This property element either references a surface via the XLink-attributes or contains the surface element. A surface element is any element which is substitutable for "_Surface".
Diagram
Diagram index2.tmp#id731 index32.tmp#id801 index32.tmp#id824
Type gml:SurfacePropertyType
Properties
content: complex
Used by
Model gml:_Surface
Children gml:_Surface
Instance
<gml:baseSurface xlink:actuate="" xlink:arcrole="" xlink:href="" gml:remoteSchema="" xlink:role="" xlink:show="" xlink:title="" xlink:type="simple">
  <gml:_Surface axisLabels="" gid="" gml:id="" srsDimension="" srsName="" uomLabels="">{1,1}</gml:_Surface>
</gml:baseSurface>
Attributes
QName Type Fixed Default Use Annotation
gml:remoteSchema anyURI optional
Reference to an XML Schema fragment that specifies the content model of the propertys value. This is in conformance with the XML Schema Section 4.14 Referencing Schemas from Elsewhere.
xlink:actuate xlink:actuateType optional
xlink:arcrole xlink:arcroleType optional
xlink:href xlink:hrefType optional
xlink:role xlink:roleType optional
xlink:show xlink:showType optional
xlink:title xlink:titleAttrType optional
xlink:type xlink:typeType simple optional
Source
<element name="baseSurface" type="gml:SurfacePropertyType">
  <annotation>
    <appinfo>
      <sch:pattern name="Check either href or content not both">
        <sch:rule context="gml:baseSurface">
          <sch:extends rule="hrefOrContent"/>
        </sch:rule>
      </sch:pattern>
    </appinfo>
    <documentation>This property element either references a surface via the XLink-attributes or contains the surface element. A surface element is any element which is substitutable for "_Surface".</documentation>
  </annotation>
</element>
Element gml:OrientableSurface
Namespace http://www.opengis.net/gml
Diagram
Diagram index2.tmp#id763 index2.tmp#id729 index2.tmp#id749 index2.tmp#id751 index2.tmp#id728 index2.tmp#id727 index6.tmp#id764 index6.tmp#id765 index6.tmp#id726 index6.tmp#id725 index32.tmp#id803 index5.tmp#id1740 index5.tmp#id1738 index5.tmp#id1739 index32.tmp#id801
Type gml:OrientableSurfaceType
Type hierarchy
Properties
content: complex
Substitution Group Affiliation
Model gml:metaDataProperty* , gml:description{0,1} , gml:name* , gml:baseSurface
Children gml:baseSurface, gml:description, gml:metaDataProperty, gml:name
Instance
<gml:OrientableSurface axisLabels="" gid="" gml:id="" orientation="+" srsDimension="" srsName="" uomLabels="">
  <gml:metaDataProperty about="" xlink:actuate="" xlink:arcrole="" xlink:href="" gml:remoteSchema="" xlink:role="" xlink:show="" xlink:title="" xlink:type="simple">{0,unbounded}</gml:metaDataProperty>
  <gml:description xlink:actuate="" xlink:arcrole="" xlink:href="" gml:remoteSchema="" xlink:role="" xlink:show="" xlink:title="" xlink:type="simple">{0,1}</gml:description>
  <gml:name codeSpace="">{0,unbounded}</gml:name>
</gml:OrientableSurface>
Attributes
QName Type Fixed Default Use Annotation
axisLabels gml:NCNameList optional
Ordered list of labels for all the axes of this CRS. The gml:axisAbbrev value should be used for these axis labels, after spaces and forbiddden characters are removed. When the srsName attribute is included, this attribute is optional. When the srsName attribute is omitted, this attribute shall also be omitted.
gid string optional
This attribute is included for backward compatibility with GML 2 and is deprecated with GML 3. This identifer is superceded by "gml:id" inherited from AbstractGMLType. The attribute "gid" should not be used anymore and may be deleted in future versions of GML without further notice.
gml:id ID optional
Database handle for the object. It is of XML type ID, so is constrained to be unique in the XML document within which it occurs. An external identifier for the object in the form of a URI may be constructed using standard XML and XPointer methods. This is done by concatenating the URI for the document, a fragment separator, and the value of the id attribute.
orientation gml:SignType + optional
If the orientation is "+", then the OrientableSurface is identical to the baseSurface. If the orientation is "-", then the OrientableSurface is a reference to a Surface with an up-normal that reverses the direction for this OrientableSurface, the sense of "the top of the surface". "+" is the default value.
srsDimension positiveInteger optional
The "srsDimension" is the length of coordinate sequence (the number of entries in the list). This dimension is specified by the coordinate reference system. When the srsName attribute is omitted, this attribute shall be omitted.
srsName anyURI optional
In general this reference points to a CRS instance of gml:CoordinateReferenceSystemType (see coordinateReferenceSystems.xsd). For well known references it is not required that the CRS description exists at the location the URI points to. If no srsName attribute is given, the CRS must be specified as part of the larger context this geometry element is part of, e.g. a geometric element like point, curve, etc. It is expected that this attribute will be specified at the direct position level only in rare cases.
uomLabels gml:NCNameList optional
Ordered list of unit of measure (uom) labels for all the axes of this CRS. The value of the string in the gml:catalogSymbol should be used for this uom labels, after spaces and forbiddden characters are removed. When the axisLabels attribute is included, this attribute shall also be included. When the axisLabels attribute is omitted, this attribute shall also be omitted.
Source
<element name="OrientableSurface" type="gml:OrientableSurfaceType" substitutionGroup="gml:_Surface"/>
Element gml:PolygonPatch
Namespace http://www.opengis.net/gml
Diagram
Diagram index5.tmp#id1737 index5.tmp#id1742 index32.tmp#id804 index32.tmp#id812 index5.tmp#id1741 index5.tmp#id1730
Type gml:PolygonPatchType
Type hierarchy
Properties
content: complex
Substitution Group Affiliation
Used by
Model gml:exterior{0,1} , gml:interior*
Children gml:exterior, gml:interior
Instance
<gml:PolygonPatch interpolation="planar">
  <gml:exterior>{0,1}</gml:exterior>
  <gml:interior>{0,unbounded}</gml:interior>
</gml:PolygonPatch>
Attributes
QName Type Fixed Default Use Annotation
interpolation gml:SurfaceInterpolationType planar optional
The attribute "interpolation" specifies the interpolation mechanism used for this surface patch. Currently only planar surface patches are defined in GML 3, the attribute is fixed to "planar", i.e. the interpolation method shall return points on a single plane. The boundary of the patch shall be contained within that plane.
Source
<element name="PolygonPatch" type="gml:PolygonPatchType" substitutionGroup="gml:_SurfacePatch"/>
Element gml:Triangle
Namespace http://www.opengis.net/gml
Diagram
Diagram index5.tmp#id1737 index5.tmp#id1745 index32.tmp#id804 index5.tmp#id1744 index5.tmp#id1730
Type gml:TriangleType
Type hierarchy
Properties
content: complex
Substitution Group Affiliation
Used by
Model gml:exterior
Children gml:exterior
Instance
<gml:Triangle interpolation="planar">
  <gml:exterior>{1,1}</gml:exterior>
</gml:Triangle>
Attributes
QName Type Fixed Default Use Annotation
interpolation gml:SurfaceInterpolationType planar optional
The attribute "interpolation" specifies the interpolation mechanism used for this surface patch. Currently only planar surface patches are defined in GML 3, the attribute is fixed to "planar", i.e. the interpolation method shall return points on a single plane. The boundary of the patch shall be contained within that plane.
Source
<element name="Triangle" type="gml:TriangleType" substitutionGroup="gml:_SurfacePatch"/>
Element gml:Rectangle
Namespace http://www.opengis.net/gml
Diagram
Diagram index5.tmp#id1737 index5.tmp#id1747 index32.tmp#id804 index5.tmp#id1746 index5.tmp#id1730
Type gml:RectangleType
Type hierarchy
Properties
content: complex
Substitution Group Affiliation
Model gml:exterior
Children gml:exterior
Instance
<gml:Rectangle interpolation="planar">
  <gml:exterior>{1,1}</gml:exterior>
</gml:Rectangle>
Attributes
QName Type Fixed Default Use Annotation
interpolation gml:SurfaceInterpolationType planar optional
The attribute "interpolation" specifies the interpolation mechanism used for this surface patch. Currently only planar surface patches are defined in GML 3, the attribute is fixed to "planar", i.e. the interpolation method shall return points on a single plane. The boundary of the patch shall be contained within that plane.
Source
<element name="Rectangle" type="gml:RectangleType" substitutionGroup="gml:_SurfacePatch"/>
Element gml:Ring
Namespace http://www.opengis.net/gml
Diagram
Diagram index2.tmp#id763 index2.tmp#id729 index2.tmp#id749 index2.tmp#id751 index2.tmp#id728 index2.tmp#id727 index6.tmp#id764 index6.tmp#id765 index6.tmp#id726 index32.tmp#id811 index5.tmp#id1587 index5.tmp#id1748 index32.tmp#id807
Type gml:RingType
Type hierarchy
Properties
content: complex
Substitution Group Affiliation
Used by
Complex Type gml:RingPropertyType
Model gml:metaDataProperty* , gml:description{0,1} , gml:name* , gml:curveMember+
Children gml:curveMember, gml:description, gml:metaDataProperty, gml:name
Instance
<gml:Ring axisLabels="" gid="" gml:id="" srsDimension="" srsName="" uomLabels="">
  <gml:metaDataProperty about="" xlink:actuate="" xlink:arcrole="" xlink:href="" gml:remoteSchema="" xlink:role="" xlink:show="" xlink:title="" xlink:type="simple">{0,unbounded}</gml:metaDataProperty>
  <gml:description xlink:actuate="" xlink:arcrole="" xlink:href="" gml:remoteSchema="" xlink:role="" xlink:show="" xlink:title="" xlink:type="simple">{0,1}</gml:description>
  <gml:name codeSpace="">{0,unbounded}</gml:name>
</gml:Ring>
Attributes
QName Type Fixed Default Use Annotation
axisLabels gml:NCNameList optional
Ordered list of labels for all the axes of this CRS. The gml:axisAbbrev value should be used for these axis labels, after spaces and forbiddden characters are removed. When the srsName attribute is included, this attribute is optional. When the srsName attribute is omitted, this attribute shall also be omitted.
gid string optional
This attribute is included for backward compatibility with GML 2 and is deprecated with GML 3. This identifer is superceded by "gml:id" inherited from AbstractGMLType. The attribute "gid" should not be used anymore and may be deleted in future versions of GML without further notice.
gml:id ID optional
Database handle for the object. It is of XML type ID, so is constrained to be unique in the XML document within which it occurs. An external identifier for the object in the form of a URI may be constructed using standard XML and XPointer methods. This is done by concatenating the URI for the document, a fragment separator, and the value of the id attribute.
srsDimension positiveInteger optional
The "srsDimension" is the length of coordinate sequence (the number of entries in the list). This dimension is specified by the coordinate reference system. When the srsName attribute is omitted, this attribute shall be omitted.
srsName anyURI optional
In general this reference points to a CRS instance of gml:CoordinateReferenceSystemType (see coordinateReferenceSystems.xsd). For well known references it is not required that the CRS description exists at the location the URI points to. If no srsName attribute is given, the CRS must be specified as part of the larger context this geometry element is part of, e.g. a geometric element like point, curve, etc. It is expected that this attribute will be specified at the direct position level only in rare cases.
uomLabels gml:NCNameList optional
Ordered list of unit of measure (uom) labels for all the axes of this CRS. The value of the string in the gml:catalogSymbol should be used for this uom labels, after spaces and forbiddden characters are removed. When the axisLabels attribute is included, this attribute shall also be included. When the axisLabels attribute is omitted, this attribute shall also be omitted.
Source
<element name="Ring" type="gml:RingType" substitutionGroup="gml:_Ring"/>
Element gml:PointGrid / gml:row
Namespace http://www.opengis.net/gml
Diagram
Diagram index6.tmp#id792 index6.tmp#id772 index6.tmp#id720 index6.tmp#id1325 index6.tmp#id1326
Properties
content: complex
maxOccurs: unbounded
Model (gml:posList | gml:pos | gml:pointProperty)
Children gml:pointProperty, gml:pos, gml:posList
Instance
<gml:row>
  <gml:posList axisLabels="" count="" srsDimension="" srsName="" uomLabels="">{1,1}</gml:posList>
</gml:row>
Source
<element name="row" maxOccurs="unbounded">
  <complexType>
    <sequence>
      <group ref="gml:geometricPositionListGroup"/>
    </sequence>
  </complexType>
</element>
Element gml:_ParametricCurveSurface
Namespace http://www.opengis.net/gml
Diagram
Diagram index5.tmp#id1737 index5.tmp#id1753 index5.tmp#id1754 index5.tmp#id1730
Type gml:AbstractParametricCurveSurfaceType
Type hierarchy
Properties
content: complex
abstract: true
Substitution Group
Substitution Group Affiliation
Model
Source
<element name="_ParametricCurveSurface" type="gml:AbstractParametricCurveSurfaceType" abstract="true" substitutionGroup="gml:_SurfacePatch"/>
Element gml:_GriddedSurface
Namespace http://www.opengis.net/gml
Diagram
Diagram index5.tmp#id1737 index5.tmp#id1753 index5.tmp#id1751 index5.tmp#id1750 index5.tmp#id1756 index5.tmp#id1757 index5.tmp#id1755 index5.tmp#id1734 index5.tmp#id1735 index5.tmp#id1736 index5.tmp#id1752
Type gml:AbstractGriddedSurfaceType
Type hierarchy
Properties
content: complex
abstract: true
Substitution Group
Substitution Group Affiliation
Model gml:row+ , gml:rows{0,1} , gml:columns{0,1}
Children gml:columns, gml:row, gml:rows
Instance
<gml:_GriddedSurface>
  <gml:row>{1,unbounded}</gml:row>
  <gml:rows>{0,1}</gml:rows>
  <gml:columns>{0,1}</gml:columns>
</gml:_GriddedSurface>
Source
<element name="_GriddedSurface" type="gml:AbstractGriddedSurfaceType" abstract="true" substitutionGroup="gml:_ParametricCurveSurface"/>
Element gml:AbstractGriddedSurfaceType / gml:rows
Namespace http://www.opengis.net/gml
Annotations
The attribute rows gives the number of rows in the parameter grid.
Diagram
Diagram
Type integer
Properties
content: simple
minOccurs: 0
Source
<element name="rows" type="integer" minOccurs="0">
  <annotation>
    <documentation>The attribute rows gives the number
         of rows in the parameter grid.</documentation>
  </annotation>
</element>
Element gml:AbstractGriddedSurfaceType / gml:columns
Namespace http://www.opengis.net/gml
Annotations
The attribute columns gives the number of columns in the parameter grid.
Diagram
Diagram
Type integer
Properties
content: simple
minOccurs: 0
Source
<element name="columns" type="integer" minOccurs="0">
  <annotation>
    <documentation>The attribute columns gives the number
        of columns in the parameter grid.</documentation>
  </annotation>
</element>
Element gml:Cone
Namespace http://www.opengis.net/gml
Diagram
Diagram index5.tmp#id1737 index5.tmp#id1753 index5.tmp#id1751 index5.tmp#id1750 index5.tmp#id1756 index5.tmp#id1757 index5.tmp#id1755 index5.tmp#id1759 index5.tmp#id1760 index5.tmp#id1758 index5.tmp#id1754
Type gml:ConeType
Type hierarchy
Properties
content: complex
Substitution Group Affiliation
Model gml:row+ , gml:rows{0,1} , gml:columns{0,1}
Children gml:columns, gml:row, gml:rows
Instance
<gml:Cone horizontalCurveType="circularArc3Points" verticalCurveType="linear">
  <gml:row>{1,unbounded}</gml:row>
  <gml:rows>{0,1}</gml:rows>
  <gml:columns>{0,1}</gml:columns>
</gml:Cone>
Attributes
QName Type Fixed Default Use Annotation
horizontalCurveType gml:CurveInterpolationType circularArc3Points optional
verticalCurveType gml:CurveInterpolationType linear optional
Source
<element name="Cone" type="gml:ConeType" substitutionGroup="gml:_GriddedSurface"/>
Element gml:Cylinder
Namespace http://www.opengis.net/gml
Diagram
Diagram index5.tmp#id1737 index5.tmp#id1753 index5.tmp#id1751 index5.tmp#id1750 index5.tmp#id1756 index5.tmp#id1757 index5.tmp#id1755 index5.tmp#id1762 index5.tmp#id1763 index5.tmp#id1761 index5.tmp#id1754
Type gml:CylinderType
Type hierarchy
Properties
content: complex
Substitution Group Affiliation
Model gml:row+ , gml:rows{0,1} , gml:columns{0,1}
Children gml:columns, gml:row, gml:rows
Instance
<gml:Cylinder horizontalCurveType="circularArc3Points" verticalCurveType="linear">
  <gml:row>{1,unbounded}</gml:row>
  <gml:rows>{0,1}</gml:rows>
  <gml:columns>{0,1}</gml:columns>
</gml:Cylinder>
Attributes
QName Type Fixed Default Use Annotation
horizontalCurveType gml:CurveInterpolationType circularArc3Points optional
verticalCurveType gml:CurveInterpolationType linear optional
Source
<element name="Cylinder" type="gml:CylinderType" substitutionGroup="gml:_GriddedSurface"/>
Element gml:Sphere
Namespace http://www.opengis.net/gml
Diagram
Diagram index5.tmp#id1737 index5.tmp#id1753 index5.tmp#id1751 index5.tmp#id1750 index5.tmp#id1756 index5.tmp#id1757 index5.tmp#id1755 index5.tmp#id1765 index5.tmp#id1766 index5.tmp#id1764 index5.tmp#id1754
Type gml:SphereType
Type hierarchy
Properties
content: complex
Substitution Group Affiliation
Model gml:row+ , gml:rows{0,1} , gml:columns{0,1}
Children gml:columns, gml:row, gml:rows
Instance
<gml:Sphere horizontalCurveType="circularArc3Points" verticalCurveType="circularArc3Points">
  <gml:row>{1,unbounded}</gml:row>
  <gml:rows>{0,1}</gml:rows>
  <gml:columns>{0,1}</gml:columns>
</gml:Sphere>
Attributes
QName Type Fixed Default Use Annotation
horizontalCurveType gml:CurveInterpolationType circularArc3Points optional
verticalCurveType gml:CurveInterpolationType circularArc3Points optional
Source
<element name="Sphere" type="gml:SphereType" substitutionGroup="gml:_GriddedSurface"/>
Element gml:PolyhedralSurface
Namespace http://www.opengis.net/gml
Diagram
Diagram index2.tmp#id763 index2.tmp#id729 index2.tmp#id729 index2.tmp#id749 index2.tmp#id749 index2.tmp#id751 index2.tmp#id751 index2.tmp#id728 index2.tmp#id727 index6.tmp#id764 index6.tmp#id765 index6.tmp#id726 index6.tmp#id725 index32.tmp#id803 index5.tmp#id1726 index5.tmp#id1725 index2.tmp#id729 index2.tmp#id729 index2.tmp#id749 index2.tmp#id749 index2.tmp#id751 index2.tmp#id751 index2.tmp#id728 index5.tmp#id1727 index5.tmp#id1767 index5.tmp#id826
Type gml:PolyhedralSurfaceType
Type hierarchy
Properties
content: complex
Substitution Group Affiliation
Model gml:metaDataProperty* , gml:description{0,1} , gml:name* , gml:polygonPatches
Children gml:description, gml:metaDataProperty, gml:name, gml:polygonPatches
Instance
<gml:PolyhedralSurface axisLabels="" gid="" gml:id="" srsDimension="" srsName="" uomLabels="">
  <gml:metaDataProperty about="" xlink:actuate="" xlink:arcrole="" xlink:href="" gml:remoteSchema="" xlink:role="" xlink:show="" xlink:title="" xlink:type="simple">{0,unbounded}</gml:metaDataProperty>
  <gml:description xlink:actuate="" xlink:arcrole="" xlink:href="" gml:remoteSchema="" xlink:role="" xlink:show="" xlink:title="" xlink:type="simple">{0,1}</gml:description>
  <gml:name codeSpace="">{0,unbounded}</gml:name>
  <gml:polygonPatches>{1,1}</gml:polygonPatches>
</gml:PolyhedralSurface>
Attributes
QName Type Fixed Default Use Annotation
axisLabels gml:NCNameList optional
Ordered list of labels for all the axes of this CRS. The gml:axisAbbrev value should be used for these axis labels, after spaces and forbiddden characters are removed. When the srsName attribute is included, this attribute is optional. When the srsName attribute is omitted, this attribute shall also be omitted.
gid string optional
This attribute is included for backward compatibility with GML 2 and is deprecated with GML 3. This identifer is superceded by "gml:id" inherited from AbstractGMLType. The attribute "gid" should not be used anymore and may be deleted in future versions of GML without further notice.
gml:id ID optional
Database handle for the object. It is of XML type ID, so is constrained to be unique in the XML document within which it occurs. An external identifier for the object in the form of a URI may be constructed using standard XML and XPointer methods. This is done by concatenating the URI for the document, a fragment separator, and the value of the id attribute.
srsDimension positiveInteger optional
The "srsDimension" is the length of coordinate sequence (the number of entries in the list). This dimension is specified by the coordinate reference system. When the srsName attribute is omitted, this attribute shall be omitted.
srsName anyURI optional
In general this reference points to a CRS instance of gml:CoordinateReferenceSystemType (see coordinateReferenceSystems.xsd). For well known references it is not required that the CRS description exists at the location the URI points to. If no srsName attribute is given, the CRS must be specified as part of the larger context this geometry element is part of, e.g. a geometric element like point, curve, etc. It is expected that this attribute will be specified at the direct position level only in rare cases.
uomLabels gml:NCNameList optional
Ordered list of unit of measure (uom) labels for all the axes of this CRS. The value of the string in the gml:catalogSymbol should be used for this uom labels, after spaces and forbiddden characters are removed. When the axisLabels attribute is included, this attribute shall also be included. When the axisLabels attribute is omitted, this attribute shall also be omitted.
Source
<element name="PolyhedralSurface" type="gml:PolyhedralSurfaceType" substitutionGroup="gml:Surface"/>
Element gml:polygonPatches
Namespace http://www.opengis.net/gml
Annotations
This property element contains a list of polygon patches. The order of the patches is significant and shall be preserved when processing the list.
Diagram
Diagram index5.tmp#id1730 index5.tmp#id1729 index5.tmp#id1731 index5.tmp#id1768 index5.tmp#id1726
Type gml:PolygonPatchArrayPropertyType
Type hierarchy
Properties
content: complex
Substitution Group Affiliation
Used by
Model gml:PolygonPatch
Children gml:PolygonPatch
Instance
<gml:polygonPatches>
  <gml:PolygonPatch interpolation="planar">{1,1}</gml:PolygonPatch>
</gml:polygonPatches>
Source
<element name="polygonPatches" type="gml:PolygonPatchArrayPropertyType" substitutionGroup="gml:patches">
  <annotation>
    <documentation>This property element contains a list of
   polygon patches. The order of the patches is significant and 
   shall be preserved when processing the list.</documentation>
  </annotation>
</element>
Element gml:trianglePatches
Namespace http://www.opengis.net/gml
Annotations
This property element contains a list of triangle patches. The order of the patches is significant and shall be preserved when processing the list.
Diagram
Diagram index5.tmp#id1730 index5.tmp#id1729 index5.tmp#id1732 index5.tmp#id1769 index5.tmp#id1726
Type gml:TrianglePatchArrayPropertyType
Type hierarchy
Properties
content: complex
Substitution Group Affiliation
Used by
Model gml:Triangle
Children gml:Triangle
Instance
<gml:trianglePatches>
  <gml:Triangle interpolation="planar">{1,1}</gml:Triangle>
</gml:trianglePatches>
Source
<element name="trianglePatches" type="gml:TrianglePatchArrayPropertyType" substitutionGroup="gml:patches">
  <annotation>
    <documentation>This property element contains a list of
   triangle patches. The order of the patches is significant and 
   shall be preserved when processing the list.</documentation>
  </annotation>
</element>
Element gml:TriangulatedSurface
Namespace http://www.opengis.net/gml
Diagram
Diagram index2.tmp#id763 index2.tmp#id729 index2.tmp#id729 index2.tmp#id749 index2.tmp#id749 index2.tmp#id751 index2.tmp#id751 index2.tmp#id728 index2.tmp#id727 index6.tmp#id764 index6.tmp#id765 index6.tmp#id726 index6.tmp#id725 index32.tmp#id803 index5.tmp#id1726 index5.tmp#id1725 index2.tmp#id729 index2.tmp#id729 index2.tmp#id749 index2.tmp#id749 index2.tmp#id751 index2.tmp#id751 index2.tmp#id728 index5.tmp#id1728 index5.tmp#id1770 index5.tmp#id829 index5.tmp#id826
Type gml:TriangulatedSurfaceType
Type hierarchy
Properties
content: complex
Substitution Group
Substitution Group Affiliation
Model gml:metaDataProperty* , gml:description{0,1} , gml:name* , gml:trianglePatches
Children gml:description, gml:metaDataProperty, gml:name, gml:trianglePatches
Instance
<gml:TriangulatedSurface axisLabels="" gid="" gml:id="" srsDimension="" srsName="" uomLabels="">
  <gml:metaDataProperty about="" xlink:actuate="" xlink:arcrole="" xlink:href="" gml:remoteSchema="" xlink:role="" xlink:show="" xlink:title="" xlink:type="simple">{0,unbounded}</gml:metaDataProperty>
  <gml:description xlink:actuate="" xlink:arcrole="" xlink:href="" gml:remoteSchema="" xlink:role="" xlink:show="" xlink:title="" xlink:type="simple">{0,1}</gml:description>
  <gml:name codeSpace="">{0,unbounded}</gml:name>
  <gml:trianglePatches>{1,1}</gml:trianglePatches>
</gml:TriangulatedSurface>
Attributes
QName Type Fixed Default Use Annotation
axisLabels gml:NCNameList optional
Ordered list of labels for all the axes of this CRS. The gml:axisAbbrev value should be used for these axis labels, after spaces and forbiddden characters are removed. When the srsName attribute is included, this attribute is optional. When the srsName attribute is omitted, this attribute shall also be omitted.
gid string optional
This attribute is included for backward compatibility with GML 2 and is deprecated with GML 3. This identifer is superceded by "gml:id" inherited from AbstractGMLType. The attribute "gid" should not be used anymore and may be deleted in future versions of GML without further notice.
gml:id ID optional
Database handle for the object. It is of XML type ID, so is constrained to be unique in the XML document within which it occurs. An external identifier for the object in the form of a URI may be constructed using standard XML and XPointer methods. This is done by concatenating the URI for the document, a fragment separator, and the value of the id attribute.
srsDimension positiveInteger optional
The "srsDimension" is the length of coordinate sequence (the number of entries in the list). This dimension is specified by the coordinate reference system. When the srsName attribute is omitted, this attribute shall be omitted.
srsName anyURI optional
In general this reference points to a CRS instance of gml:CoordinateReferenceSystemType (see coordinateReferenceSystems.xsd). For well known references it is not required that the CRS description exists at the location the URI points to. If no srsName attribute is given, the CRS must be specified as part of the larger context this geometry element is part of, e.g. a geometric element like point, curve, etc. It is expected that this attribute will be specified at the direct position level only in rare cases.
uomLabels gml:NCNameList optional
Ordered list of unit of measure (uom) labels for all the axes of this CRS. The value of the string in the gml:catalogSymbol should be used for this uom labels, after spaces and forbiddden characters are removed. When the axisLabels attribute is included, this attribute shall also be included. When the axisLabels attribute is omitted, this attribute shall also be omitted.
Source
<element name="TriangulatedSurface" type="gml:TriangulatedSurfaceType" substitutionGroup="gml:Surface"/>
Element gml:Tin
Namespace http://www.opengis.net/gml
Diagram
Diagram index2.tmp#id763 index2.tmp#id729 index2.tmp#id729 index2.tmp#id749 index2.tmp#id749 index2.tmp#id751 index2.tmp#id751 index2.tmp#id728 index2.tmp#id727 index6.tmp#id764 index6.tmp#id765 index6.tmp#id726 index6.tmp#id725 index32.tmp#id803 index5.tmp#id1726 index5.tmp#id1725 index2.tmp#id729 index2.tmp#id729 index2.tmp#id749 index2.tmp#id749 index2.tmp#id751 index2.tmp#id751 index2.tmp#id728 index5.tmp#id1728 index5.tmp#id1770 index5.tmp#id1772 index5.tmp#id1774 index5.tmp#id1775 index5.tmp#id1776 index5.tmp#id1771 index5.tmp#id828
Type gml:TinType
Type hierarchy
Properties
content: complex
Substitution Group Affiliation
Model gml:metaDataProperty* , gml:description{0,1} , gml:name* , gml:trianglePatches , gml:stopLines* , gml:breakLines* , gml:maxLength , gml:controlPoint
Children gml:breakLines, gml:controlPoint, gml:description, gml:maxLength, gml:metaDataProperty, gml:name, gml:stopLines, gml:trianglePatches
Instance
<gml:Tin axisLabels="" gid="" gml:id="" srsDimension="" srsName="" uomLabels="">
  <gml:metaDataProperty about="" xlink:actuate="" xlink:arcrole="" xlink:href="" gml:remoteSchema="" xlink:role="" xlink:show="" xlink:title="" xlink:type="simple">{0,unbounded}</gml:metaDataProperty>
  <gml:description xlink:actuate="" xlink:arcrole="" xlink:href="" gml:remoteSchema="" xlink:role="" xlink:show="" xlink:title="" xlink:type="simple">{0,1}</gml:description>
  <gml:name codeSpace="">{0,unbounded}</gml:name>
  <gml:trianglePatches>{1,1}</gml:trianglePatches>
</gml:Tin>
Attributes
QName Type Fixed Default Use Annotation
axisLabels gml:NCNameList optional
Ordered list of labels for all the axes of this CRS. The gml:axisAbbrev value should be used for these axis labels, after spaces and forbiddden characters are removed. When the srsName attribute is included, this attribute is optional. When the srsName attribute is omitted, this attribute shall also be omitted.
gid string optional
This attribute is included for backward compatibility with GML 2 and is deprecated with GML 3. This identifer is superceded by "gml:id" inherited from AbstractGMLType. The attribute "gid" should not be used anymore and may be deleted in future versions of GML without further notice.
gml:id ID optional
Database handle for the object. It is of XML type ID, so is constrained to be unique in the XML document within which it occurs. An external identifier for the object in the form of a URI may be constructed using standard XML and XPointer methods. This is done by concatenating the URI for the document, a fragment separator, and the value of the id attribute.
srsDimension positiveInteger optional
The "srsDimension" is the length of coordinate sequence (the number of entries in the list). This dimension is specified by the coordinate reference system. When the srsName attribute is omitted, this attribute shall be omitted.
srsName anyURI optional
In general this reference points to a CRS instance of gml:CoordinateReferenceSystemType (see coordinateReferenceSystems.xsd). For well known references it is not required that the CRS description exists at the location the URI points to. If no srsName attribute is given, the CRS must be specified as part of the larger context this geometry element is part of, e.g. a geometric element like point, curve, etc. It is expected that this attribute will be specified at the direct position level only in rare cases.
uomLabels gml:NCNameList optional
Ordered list of unit of measure (uom) labels for all the axes of this CRS. The value of the string in the gml:catalogSymbol should be used for this uom labels, after spaces and forbiddden characters are removed. When the axisLabels attribute is included, this attribute shall also be included. When the axisLabels attribute is omitted, this attribute shall also be omitted.
Source
<element name="Tin" type="gml:TinType" substitutionGroup="gml:TriangulatedSurface"/>
Element gml:TinType / gml:stopLines
Namespace http://www.opengis.net/gml
Annotations
Stoplines are lines where the local continuity or regularity of the surface is questionable. In the area of these pathologies, triangles intersecting a stopline shall be removed from the tin surface, leaving holes in the surface. If coincidence occurs on surface boundary triangles, the result shall be a change of the surface boundary. Stoplines contains all these pathological segments as a set of line strings.
Diagram
Diagram index5.tmp#id1636 index5.tmp#id1773
Type gml:LineStringSegmentArrayPropertyType
Properties
content: complex
minOccurs: 0
maxOccurs: unbounded
Model gml:LineStringSegment*
Children gml:LineStringSegment
Instance
<gml:stopLines>
  <gml:LineStringSegment interpolation="linear" numDerivativeInterior="0" numDerivativesAtEnd="0" numDerivativesAtStart="0">{0,unbounded}</gml:LineStringSegment>
</gml:stopLines>
Source
<element name="stopLines" type="gml:LineStringSegmentArrayPropertyType" minOccurs="0" maxOccurs="unbounded">
  <annotation>
    <documentation>Stoplines are lines where the local
       continuity or regularity of the surface is questionable.
       In the area of these pathologies, triangles intersecting
       a stopline shall be removed from the tin surface, leaving
       holes in the surface. If coincidence occurs on surface
       boundary triangles, the result shall be a change of the 
       surface boundary. Stoplines contains all these
       pathological segments as a set of line strings.</documentation>
  </annotation>
</element>
Element gml:TinType / gml:breakLines
Namespace http://www.opengis.net/gml
Annotations
Breaklines are lines of a critical nature to the shape of the surface, representing local ridges, or depressions (such as drainage lines) in the surface. As such their constituent segments must be included in the tin eve if doing so violates the Delauny criterion. Break lines contains these critical segments as a set of line strings.
Diagram
Diagram index5.tmp#id1636 index5.tmp#id1773
Type gml:LineStringSegmentArrayPropertyType
Properties
content: complex
minOccurs: 0
maxOccurs: unbounded
Model gml:LineStringSegment*
Children gml:LineStringSegment
Instance
<gml:breakLines>
  <gml:LineStringSegment interpolation="linear" numDerivativeInterior="0" numDerivativesAtEnd="0" numDerivativesAtStart="0">{0,unbounded}</gml:LineStringSegment>
</gml:breakLines>
Source
<element name="breakLines" type="gml:LineStringSegmentArrayPropertyType" minOccurs="0" maxOccurs="unbounded">
  <annotation>
    <documentation>Breaklines are lines of a critical
       nature to the shape of the surface, representing local
       ridges, or depressions (such as drainage lines) in the
       surface. As such their constituent segments must be
       included in the tin eve if doing so
       violates the Delauny criterion. Break lines contains these
       critical segments as a set of line strings.</documentation>
  </annotation>
</element>
Element gml:TinType / gml:maxLength
Namespace http://www.opengis.net/gml
Annotations
Areas of the surface where data is not sufficiently dense to assure reasonable calculation shall be removed by adding a retention criterion for triangles based on the length of their sides. For many triangle sides exceeding maximum length, the adjacent triangles to that triangle side shall be removed from the surface.
Diagram
Diagram index23.tmp#id1244 index23.tmp#id1243 index13.tmp#id1328
Type gml:LengthType
Type hierarchy
Properties
content: complex
Attributes
QName Type Fixed Default Use Annotation
uom anyURI required
Source
<element name="maxLength" type="gml:LengthType">
  <annotation>
    <documentation>Areas of the surface where data is not 
       sufficiently dense to assure reasonable calculation shall be    
       removed by adding a retention criterion for triangles based 
       on the length of their sides. For many triangle sides  
       exceeding maximum length, the adjacent triangles to that 
       triangle side shall be removed from the surface.</documentation>
  </annotation>
</element>
Element gml:TinType / gml:controlPoint
Namespace http://www.opengis.net/gml
Annotations
The corners of the triangles in the TIN are often referred to as pots. ControlPoint shall contain a set of the GM_Position used as posts for this TIN. Since each TIN contains triangles, there must be at least 3 posts. The order in which these points are given does not affect the surface that is represented. Application schemas may add information based on ordering of control points to facilitate the reconstruction of the TIN from the control points.
Diagram
Diagram index6.tmp#id792 index6.tmp#id772 index6.tmp#id720 index6.tmp#id1325
Properties
content: complex
Model gml:posList | gml:pos | gml:pointProperty
Children gml:pointProperty, gml:pos, gml:posList
Instance
<gml:controlPoint>
  <gml:posList axisLabels="" count="" srsDimension="" srsName="" uomLabels="">{1,1}</gml:posList>
</gml:controlPoint>
Source
<element name="controlPoint">
  <annotation>
    <documentation>The corners of the triangles in the TIN 
  are often referred to as pots. ControlPoint shall contain a 
  set of the GM_Position used as posts for this TIN. Since each  
  TIN contains triangles, there must be at least 3 posts. The 
       order in which these points are given does not affect the 
       surface that is represented. Application schemas may add 
       information based on ordering of control points to facilitate 
       the reconstruction of the TIN from the control points.</documentation>
  </annotation>
  <complexType>
    <choice>
      <element ref="gml:posList"/>
      <group ref="gml:geometricPositionGroup" minOccurs="3" maxOccurs="unbounded"/>
    </choice>
  </complexType>
</element>
Element gml:solidProperty
Namespace http://www.opengis.net/gml
Annotations
This property element either references a solid via the XLink-attributes or contains the solid element. solidProperty is the predefined property which can be used by GML Application Schemas whenever a GML Feature has a property with a value that is substitutable for _Solid.
Diagram
Diagram index2.tmp#id731 index5.tmp#id1591 index5.tmp#id1595
Type gml:SolidPropertyType
Properties
content: complex
Model gml:_Solid
Children gml:_Solid
Instance
<gml:solidProperty xlink:actuate="" xlink:arcrole="" xlink:href="" gml:remoteSchema="" xlink:role="" xlink:show="" xlink:title="" xlink:type="simple">
  <gml:_Solid axisLabels="" gid="" gml:id="" srsDimension="" srsName="" uomLabels="">{1,1}</gml:_Solid>
</gml:solidProperty>
Attributes
QName Type Fixed Default Use Annotation
gml:remoteSchema anyURI optional
Reference to an XML Schema fragment that specifies the content model of the propertys value. This is in conformance with the XML Schema Section 4.14 Referencing Schemas from Elsewhere.
xlink:actuate xlink:actuateType optional
xlink:arcrole xlink:arcroleType optional
xlink:href xlink:hrefType optional
xlink:role xlink:roleType optional
xlink:show xlink:showType optional
xlink:title xlink:titleAttrType optional
xlink:type xlink:typeType simple optional
Source
<element name="solidProperty" type="gml:SolidPropertyType">
  <annotation>
    <appinfo>
      <sch:pattern name="Check either href or content not both">
        <sch:rule context="gml:solidProperty">
          <sch:extends rule="hrefOrContent"/>
        </sch:rule>
      </sch:pattern>
    </appinfo>
    <documentation>This property element either references a solid via the XLink-attributes or contains the solid element. solidProperty is the predefined property which can be used by GML Application Schemas whenever a GML Feature has a property with a value that is substitutable for _Solid.</documentation>
  </annotation>
</element>
Element gml:solidArrayProperty
Namespace http://www.opengis.net/gml
Diagram
Diagram index5.tmp#id1591 index5.tmp#id1618
Type gml:SolidArrayPropertyType
Properties
content: complex
Model gml:_Solid
Children gml:_Solid
Instance
<gml:solidArrayProperty>
  <gml:_Solid axisLabels="" gid="" gml:id="" srsDimension="" srsName="" uomLabels="">{1,1}</gml:_Solid>
</gml:solidArrayProperty>
Source
<element name="solidArrayProperty" type="gml:SolidArrayPropertyType"/>
Element gml:Solid
Namespace http://www.opengis.net/gml
Diagram
Diagram index2.tmp#id763 index2.tmp#id729 index2.tmp#id749 index2.tmp#id751 index2.tmp#id728 index2.tmp#id727 index6.tmp#id764 index6.tmp#id765 index6.tmp#id726 index6.tmp#id725 index5.tmp#id1593 index5.tmp#id1780 index5.tmp#id1781 index5.tmp#id1779 index5.tmp#id1591
Type gml:SolidType
Type hierarchy
Properties
content: complex
Substitution Group Affiliation
Model gml:metaDataProperty* , gml:description{0,1} , gml:name* , gml:exterior{0,1} , gml:interior*
Children gml:description, gml:exterior, gml:interior, gml:metaDataProperty, gml:name
Instance
<gml:Solid axisLabels="" gid="" gml:id="" srsDimension="" srsName="" uomLabels="">
  <gml:metaDataProperty about="" xlink:actuate="" xlink:arcrole="" xlink:href="" gml:remoteSchema="" xlink:role="" xlink:show="" xlink:title="" xlink:type="simple">{0,unbounded}</gml:metaDataProperty>
  <gml:description xlink:actuate="" xlink:arcrole="" xlink:href="" gml:remoteSchema="" xlink:role="" xlink:show="" xlink:title="" xlink:type="simple">{0,1}</gml:description>
  <gml:name codeSpace="">{0,unbounded}</gml:name>
</gml:Solid>
Attributes
QName Type Fixed Default Use Annotation
axisLabels gml:NCNameList optional
Ordered list of labels for all the axes of this CRS. The gml:axisAbbrev value should be used for these axis labels, after spaces and forbiddden characters are removed. When the srsName attribute is included, this attribute is optional. When the srsName attribute is omitted, this attribute shall also be omitted.
gid string optional
This attribute is included for backward compatibility with GML 2 and is deprecated with GML 3. This identifer is superceded by "gml:id" inherited from AbstractGMLType. The attribute "gid" should not be used anymore and may be deleted in future versions of GML without further notice.
gml:id ID optional
Database handle for the object. It is of XML type ID, so is constrained to be unique in the XML document within which it occurs. An external identifier for the object in the form of a URI may be constructed using standard XML and XPointer methods. This is done by concatenating the URI for the document, a fragment separator, and the value of the id attribute.
srsDimension positiveInteger optional
The "srsDimension" is the length of coordinate sequence (the number of entries in the list). This dimension is specified by the coordinate reference system. When the srsName attribute is omitted, this attribute shall be omitted.
srsName anyURI optional
In general this reference points to a CRS instance of gml:CoordinateReferenceSystemType (see coordinateReferenceSystems.xsd). For well known references it is not required that the CRS description exists at the location the URI points to. If no srsName attribute is given, the CRS must be specified as part of the larger context this geometry element is part of, e.g. a geometric element like point, curve, etc. It is expected that this attribute will be specified at the direct position level only in rare cases.
uomLabels gml:NCNameList optional
Ordered list of unit of measure (uom) labels for all the axes of this CRS. The value of the string in the gml:catalogSymbol should be used for this uom labels, after spaces and forbiddden characters are removed. When the axisLabels attribute is included, this attribute shall also be included. When the axisLabels attribute is omitted, this attribute shall also be omitted.
Source
<element name="Solid" type="gml:SolidType" substitutionGroup="gml:_Solid"/>
Element gml:SolidType / gml:exterior
Namespace http://www.opengis.net/gml
Annotations
Boundaries of solids are similar to surface boundaries. In normal 3-dimensional Euclidean space, one (composite) surface is distinguished as the exterior. In the more general case, this is not always possible.
Diagram
Diagram index2.tmp#id731 index32.tmp#id801 index32.tmp#id824
Type gml:SurfacePropertyType
Properties
content: complex
minOccurs: 0
Model gml:_Surface
Children gml:_Surface
Instance
<gml:exterior xlink:actuate="" xlink:arcrole="" xlink:href="" gml:remoteSchema="" xlink:role="" xlink:show="" xlink:title="" xlink:type="simple">
  <gml:_Surface axisLabels="" gid="" gml:id="" srsDimension="" srsName="" uomLabels="">{1,1}</gml:_Surface>
</gml:exterior>
Attributes
QName Type Fixed Default Use Annotation
gml:remoteSchema anyURI optional
Reference to an XML Schema fragment that specifies the content model of the propertys value. This is in conformance with the XML Schema Section 4.14 Referencing Schemas from Elsewhere.
xlink:actuate xlink:actuateType optional
xlink:arcrole xlink:arcroleType optional
xlink:href xlink:hrefType optional
xlink:role xlink:roleType optional
xlink:show xlink:showType optional
xlink:title xlink:titleAttrType optional
xlink:type xlink:typeType simple optional
Source
<element name="exterior" type="gml:SurfacePropertyType" minOccurs="0">
  <annotation>
    <appinfo>
      <sch:pattern name="Check either href or content not both">
        <sch:rule context="gml:exterior">
          <sch:extends rule="hrefOrContent"/>
        </sch:rule>
      </sch:pattern>
    </appinfo>
    <documentation>Boundaries of solids are similar to surface boundaries. In normal 3-dimensional Euclidean space, one (composite) surface is distinguished as the exterior. In the more general case, this is not always possible.</documentation>
  </annotation>
</element>
Element gml:SolidType / gml:interior
Namespace http://www.opengis.net/gml
Annotations
Boundaries of solids are similar to surface boundaries.
Diagram
Diagram index2.tmp#id731 index32.tmp#id801 index32.tmp#id824
Type gml:SurfacePropertyType
Properties
content: complex
minOccurs: 0
maxOccurs: unbounded
Model gml:_Surface
Children gml:_Surface
Instance
<gml:interior xlink:actuate="" xlink:arcrole="" xlink:href="" gml:remoteSchema="" xlink:role="" xlink:show="" xlink:title="" xlink:type="simple">
  <gml:_Surface axisLabels="" gid="" gml:id="" srsDimension="" srsName="" uomLabels="">{1,1}</gml:_Surface>
</gml:interior>
Attributes
QName Type Fixed Default Use Annotation
gml:remoteSchema anyURI optional
Reference to an XML Schema fragment that specifies the content model of the propertys value. This is in conformance with the XML Schema Section 4.14 Referencing Schemas from Elsewhere.
xlink:actuate xlink:actuateType optional
xlink:arcrole xlink:arcroleType optional
xlink:href xlink:hrefType optional
xlink:role xlink:roleType optional
xlink:show xlink:showType optional
xlink:title xlink:titleAttrType optional
xlink:type xlink:typeType simple optional
Source
<element name="interior" type="gml:SurfacePropertyType" minOccurs="0" maxOccurs="unbounded">
  <annotation>
    <appinfo>
      <sch:pattern name="Check either href or content not both">
        <sch:rule context="gml:interior">
          <sch:extends rule="hrefOrContent"/>
        </sch:rule>
      </sch:pattern>
    </appinfo>
    <documentation>Boundaries of solids are similar to surface boundaries.</documentation>
  </annotation>
</element>
Complex Type gml:AbstractSolidType
Namespace http://www.opengis.net/gml
Annotations
An abstraction of a solid to support the different levels of complexity. A solid is always contiguous.
Diagram
Diagram index2.tmp#id763 index2.tmp#id729 index2.tmp#id749 index2.tmp#id751 index2.tmp#id728 index2.tmp#id727 index6.tmp#id764 index6.tmp#id765 index6.tmp#id726 index6.tmp#id725
Type extension of gml:AbstractGeometricPrimitiveType
Type hierarchy
Used by
Model gml:metaDataProperty* , gml:description{0,1} , gml:name*
Children gml:description, gml:metaDataProperty, gml:name
Attributes
QName Type Fixed Default Use Annotation
axisLabels gml:NCNameList optional
Ordered list of labels for all the axes of this CRS. The gml:axisAbbrev value should be used for these axis labels, after spaces and forbiddden characters are removed. When the srsName attribute is included, this attribute is optional. When the srsName attribute is omitted, this attribute shall also be omitted.
gid string optional
This attribute is included for backward compatibility with GML 2 and is deprecated with GML 3. This identifer is superceded by "gml:id" inherited from AbstractGMLType. The attribute "gid" should not be used anymore and may be deleted in future versions of GML without further notice.
gml:id ID optional
Database handle for the object. It is of XML type ID, so is constrained to be unique in the XML document within which it occurs. An external identifier for the object in the form of a URI may be constructed using standard XML and XPointer methods. This is done by concatenating the URI for the document, a fragment separator, and the value of the id attribute.
srsDimension positiveInteger optional
The "srsDimension" is the length of coordinate sequence (the number of entries in the list). This dimension is specified by the coordinate reference system. When the srsName attribute is omitted, this attribute shall be omitted.
srsName anyURI optional
In general this reference points to a CRS instance of gml:CoordinateReferenceSystemType (see coordinateReferenceSystems.xsd). For well known references it is not required that the CRS description exists at the location the URI points to. If no srsName attribute is given, the CRS must be specified as part of the larger context this geometry element is part of, e.g. a geometric element like point, curve, etc. It is expected that this attribute will be specified at the direct position level only in rare cases.
uomLabels gml:NCNameList optional
Ordered list of unit of measure (uom) labels for all the axes of this CRS. The value of the string in the gml:catalogSymbol should be used for this uom labels, after spaces and forbiddden characters are removed. When the axisLabels attribute is included, this attribute shall also be included. When the axisLabels attribute is omitted, this attribute shall also be omitted.
Source
<complexType name="AbstractSolidType">
  <annotation>
    <documentation>An abstraction of a solid to support the different levels of complexity. A solid is always contiguous.</documentation>
  </annotation>
  <complexContent>
    <extension base="gml:AbstractGeometricPrimitiveType"/>
  </complexContent>
</complexType>
Complex Type gml:SolidPropertyType
Namespace http://www.opengis.net/gml
Annotations
A property that has a solid as its value domain can either be an appropriate geometry element encapsulated in an element of this type or an XLink reference to a remote geometry element (where remote includes geometry elements located elsewhere in the same document). Either the reference or the contained element must be given, but neither both nor none.
Diagram
Diagram index2.tmp#id731 index5.tmp#id1591
Used by
Model gml:_Solid
Children gml:_Solid
Attributes
QName Type Fixed Default Use Annotation
gml:remoteSchema anyURI optional
Reference to an XML Schema fragment that specifies the content model of the propertys value. This is in conformance with the XML Schema Section 4.14 Referencing Schemas from Elsewhere.
xlink:actuate xlink:actuateType optional
xlink:arcrole xlink:arcroleType optional
xlink:href xlink:hrefType optional
xlink:role xlink:roleType optional
xlink:show xlink:showType optional
xlink:title xlink:titleAttrType optional
xlink:type xlink:typeType simple optional
Source
<complexType name="SolidPropertyType">
  <annotation>
    <documentation>A property that has a solid as its value domain can either be an appropriate geometry element encapsulated in an element of this type or an XLink reference to a remote geometry element (where remote includes geometry elements located elsewhere in the same document). Either the reference or the contained element must be given, but neither both nor none.</documentation>
  </annotation>
  <sequence minOccurs="0">
    <element ref="gml:_Solid"/>
  </sequence>
  <attributeGroup ref="gml:AssociationAttributeGroup">
    <annotation>
      <documentation>This attribute group includes the XLink attributes (see xlinks.xsd). XLink is used in GML to reference remote resources (including those elsewhere in the same document). A simple link element can be constructed by including a specific set of XLink attributes. The XML Linking Language (XLink) is currently a Proposed Recommendation of the World Wide Web Consortium. XLink allows elements to be inserted into XML documents so as to create sophisticated links between resources; such links can be used to reference remote properties.
A simple link element can be used to implement pointer functionality, and this functionality has been built into various GML 3 elements by including the gml:AssociationAttributeGroup.</documentation>
    </annotation>
  </attributeGroup>
</complexType>
Complex Type gml:SolidArrayPropertyType
Namespace http://www.opengis.net/gml
Annotations
A container for an array of solids. The elements are always contained in the array property, referencing geometry elements or arrays of geometry elements is not supported.
Diagram
Diagram index5.tmp#id1591
Used by
Model gml:_Solid
Children gml:_Solid
Source
<complexType name="SolidArrayPropertyType">
  <annotation>
    <documentation>A container for an array of solids. The elements are always contained in the array property, referencing geometry elements or arrays of geometry elements is not supported.</documentation>
  </annotation>
  <sequence minOccurs="0" maxOccurs="unbounded">
    <element ref="gml:_Solid"/>
  </sequence>
</complexType>
Complex Type gml:CurveType
Namespace http://www.opengis.net/gml
Annotations
Curve is a 1-dimensional primitive. Curves are continuous, connected, and have a measurable length in terms of the coordinate system. A curve is composed of one or more curve segments. Each curve segment within a curve may be defined using a different interpolation method. The curve segments are connected to one another, with the end point of each segment except the last being the start point of the next segment in the segment list. The orientation of the curve is positive.
Diagram
Diagram index2.tmp#id763 index2.tmp#id729 index2.tmp#id749 index2.tmp#id751 index2.tmp#id728 index2.tmp#id727 index6.tmp#id764 index6.tmp#id765 index6.tmp#id726 index6.tmp#id725 index6.tmp#id790 index5.tmp#id1633
Type extension of gml:AbstractCurveType
Type hierarchy
Used by
Element gml:Curve
Model gml:metaDataProperty* , gml:description{0,1} , gml:name* , gml:segments
Children gml:description, gml:metaDataProperty, gml:name, gml:segments
Attributes
QName Type Fixed Default Use Annotation
axisLabels gml:NCNameList optional
Ordered list of labels for all the axes of this CRS. The gml:axisAbbrev value should be used for these axis labels, after spaces and forbiddden characters are removed. When the srsName attribute is included, this attribute is optional. When the srsName attribute is omitted, this attribute shall also be omitted.
gid string optional
This attribute is included for backward compatibility with GML 2 and is deprecated with GML 3. This identifer is superceded by "gml:id" inherited from AbstractGMLType. The attribute "gid" should not be used anymore and may be deleted in future versions of GML without further notice.
gml:id ID optional
Database handle for the object. It is of XML type ID, so is constrained to be unique in the XML document within which it occurs. An external identifier for the object in the form of a URI may be constructed using standard XML and XPointer methods. This is done by concatenating the URI for the document, a fragment separator, and the value of the id attribute.
srsDimension positiveInteger optional
The "srsDimension" is the length of coordinate sequence (the number of entries in the list). This dimension is specified by the coordinate reference system. When the srsName attribute is omitted, this attribute shall be omitted.
srsName anyURI optional
In general this reference points to a CRS instance of gml:CoordinateReferenceSystemType (see coordinateReferenceSystems.xsd). For well known references it is not required that the CRS description exists at the location the URI points to. If no srsName attribute is given, the CRS must be specified as part of the larger context this geometry element is part of, e.g. a geometric element like point, curve, etc. It is expected that this attribute will be specified at the direct position level only in rare cases.
uomLabels gml:NCNameList optional
Ordered list of unit of measure (uom) labels for all the axes of this CRS. The value of the string in the gml:catalogSymbol should be used for this uom labels, after spaces and forbiddden characters are removed. When the axisLabels attribute is included, this attribute shall also be included. When the axisLabels attribute is omitted, this attribute shall also be omitted.
Source
<complexType name="CurveType">
  <annotation>
    <documentation>Curve is a 1-dimensional primitive. Curves are continuous, connected, and have a measurable length in terms of the coordinate system. 
				A curve is composed of one or more curve segments. Each curve segment within a curve may be defined using a different interpolation method. The curve segments are connected to one another, with the end point of each segment except the last being the start point of the next segment in the segment list.
				The orientation of the curve is positive.</documentation>
  </annotation>
  <complexContent>
    <extension base="gml:AbstractCurveType">
      <sequence>
        <element ref="gml:segments">
          <annotation>
            <documentation>This element encapsulates the segments of the curve.</documentation>
          </annotation>
        </element>
      </sequence>
    </extension>
  </complexContent>
</complexType>
Complex Type gml:CurveSegmentArrayPropertyType
Namespace http://www.opengis.net/gml
Annotations
A container for an array of curve segments.
Diagram
Diagram index5.tmp#id1635
Used by
Element gml:segments
Model gml:_CurveSegment*
Children gml:_CurveSegment
Source
<complexType name="CurveSegmentArrayPropertyType">
  <annotation>
    <documentation>A container for an array of curve segments.</documentation>
  </annotation>
  <sequence>
    <element ref="gml:_CurveSegment" minOccurs="0" maxOccurs="unbounded"/>
  </sequence>
</complexType>
Complex Type gml:AbstractCurveSegmentType
Namespace http://www.opengis.net/gml
Annotations
Curve segment defines a homogeneous segment of a curve.
Diagram
Diagram index5.tmp#id1652 index5.tmp#id1653 index5.tmp#id1654
Properties
abstract: true
Used by
Model
Attributes
QName Type Fixed Default Use Annotation
numDerivativeInterior integer 0 optional
The attribute "numDerivativesInterior" specifies the type of continuity that is guaranteed interior to the curve. The default value of "0" means simple continuity, which is a mandatory minimum level of continuity. This level is referred to as "C 0 " in mathematical texts. A value of 1 means that the function and its first derivative are continuous at the appropriate end point: "C 1 " continuity. A value of "n" for any integer means the function and its first n derivatives are continuous: "C n " continuity. NOTE: Use of these values is only appropriate when the basic curve definition is an underdetermined system. For example, line string segments cannot support continuity above C 0 , since there is no spare control parameter to adjust the incoming angle at the end points of the segment. Spline functions on the other hand often have extra degrees of freedom on end segments that allow them to adjust the values of the derivatives to support C 1 or higher continuity.
numDerivativesAtEnd integer 0 optional
The attribute "numDerivativesAtEnd" specifies the type of continuity between this curve segment and its successor. If this is the last curve segment in the curve, one of these values, as appropriate, is ignored. The default value of "0" means simple continuity, which is a mandatory minimum level of continuity. This level is referred to as "C 0 " in mathematical texts. A value of 1 means that the function and its first derivative are continuous at the appropriate end point: "C 1 " continuity. A value of "n" for any integer means the function and its first n derivatives are continuous: "C n " continuity. NOTE: Use of these values is only appropriate when the basic curve definition is an underdetermined system. For example, line string segments cannot support continuity above C 0 , since there is no spare control parameter to adjust the incoming angle at the end points of the segment. Spline functions on the other hand often have extra degrees of freedom on end segments that allow them to adjust the values of the derivatives to support C 1 or higher continuity.
numDerivativesAtStart integer 0 optional
The attribute "numDerivativesAtStart" specifies the type of continuity between this curve segment and its predecessor. If this is the first curve segment in the curve, one of these values, as appropriate, is ignored. The default value of "0" means simple continuity, which is a mandatory minimum level of continuity. This level is referred to as "C 0 " in mathematical texts. A value of 1 means that the function and its first derivative are continuous at the appropriate end point: "C 1 " continuity. A value of "n" for any integer means the function and its first n derivatives are continuous: "C n " continuity. NOTE: Use of these values is only appropriate when the basic curve definition is an underdetermined system. For example, line string segments cannot support continuity above C 0 , since there is no spare control parameter to adjust the incoming angle at the end points of the segment. Spline functions on the other hand often have extra degrees of freedom on end segments that allow them to adjust the values of the derivatives to support C 1 or higher continuity.
Source
<complexType name="AbstractCurveSegmentType" abstract="true">
  <annotation>
    <documentation>Curve segment defines a homogeneous segment of a curve.</documentation>
  </annotation>
  <sequence/>
  <attribute name="numDerivativesAtStart" type="integer" use="optional" default="0">
    <annotation>
      <documentation>The attribute "numDerivativesAtStart" specifies the type of continuity between this curve segment and its predecessor. If this is the first curve segment in the curve, one of these values, as appropriate, is ignored. The default value of "0" means simple continuity, which is a mandatory minimum level of continuity. This level is referred to as "C 0 " in mathematical texts. A value of 1 means that the function and its first derivative are continuous at the appropriate end point: "C 1 " continuity. A value of "n" for any integer means the function and its first n derivatives are continuous: "C n " continuity.
NOTE: Use of these values is only appropriate when the basic curve definition is an underdetermined system. For example, line string segments cannot support continuity above C 0 , since there is no spare control parameter to adjust the incoming angle at the end points of the segment. Spline functions on the other hand often have extra degrees of freedom on end segments that allow them to adjust the values of the derivatives to support C 1 or higher continuity.</documentation>
    </annotation>
  </attribute>
  <attribute name="numDerivativesAtEnd" type="integer" use="optional" default="0">
    <annotation>
      <documentation>The attribute "numDerivativesAtEnd" specifies the type of continuity between this curve segment and its successor. If this is the last curve segment in the curve, one of these values, as appropriate, is ignored. The default value of "0" means simple continuity, which is a mandatory minimum level of continuity. This level is referred to as "C 0 " in mathematical texts. A value of 1 means that the function and its first derivative are continuous at the appropriate end point: "C 1 " continuity. A value of "n" for any integer means the function and its first n derivatives are continuous: "C n " continuity.
NOTE: Use of these values is only appropriate when the basic curve definition is an underdetermined system. For example, line string segments cannot support continuity above C 0 , since there is no spare control parameter to adjust the incoming angle at the end points of the segment. Spline functions on the other hand often have extra degrees of freedom on end segments that allow them to adjust the values of the derivatives to support C 1 or higher continuity.</documentation>
    </annotation>
  </attribute>
  <attribute name="numDerivativeInterior" type="integer" use="optional" default="0">
    <annotation>
      <documentation>The attribute "numDerivativesInterior" specifies the type of continuity that is guaranteed interior to the curve. The default value of "0" means simple continuity, which is a mandatory minimum level of continuity. This level is referred to as "C 0 " in mathematical texts. A value of 1 means that the function and its first derivative are continuous at the appropriate end point: "C 1 " continuity. A value of "n" for any integer means the function and its first n derivatives are continuous: "C n " continuity.
NOTE: Use of these values is only appropriate when the basic curve definition is an underdetermined system. For example, line string segments cannot support continuity above C 0 , since there is no spare control parameter to adjust the incoming angle at the end points of the segment. Spline functions on the other hand often have extra degrees of freedom on end segments that allow them to adjust the values of the derivatives to support C 1 or higher continuity.</documentation>
    </annotation>
  </attribute>
</complexType>
Complex Type gml:OrientableCurveType
Namespace http://www.opengis.net/gml
Annotations
OrientableCurve consists of a curve and an orientation. If the orientation is "+", then the OrientableCurve is identical to the baseCurve. If the orientation is "-", then the OrientableCurve is related to another _Curve with a parameterization that reverses the sense of the curve traversal.
Diagram
Diagram index2.tmp#id763 index2.tmp#id729 index2.tmp#id749 index2.tmp#id751 index2.tmp#id728 index2.tmp#id727 index6.tmp#id764 index6.tmp#id765 index6.tmp#id726 index6.tmp#id725 index6.tmp#id790 index5.tmp#id1657 index5.tmp#id1655
Type extension of gml:AbstractCurveType
Type hierarchy
Used by
Model gml:metaDataProperty* , gml:description{0,1} , gml:name* , gml:baseCurve
Children gml:baseCurve, gml:description, gml:metaDataProperty, gml:name
Attributes
QName Type Fixed Default Use Annotation
axisLabels gml:NCNameList optional
Ordered list of labels for all the axes of this CRS. The gml:axisAbbrev value should be used for these axis labels, after spaces and forbiddden characters are removed. When the srsName attribute is included, this attribute is optional. When the srsName attribute is omitted, this attribute shall also be omitted.
gid string optional
This attribute is included for backward compatibility with GML 2 and is deprecated with GML 3. This identifer is superceded by "gml:id" inherited from AbstractGMLType. The attribute "gid" should not be used anymore and may be deleted in future versions of GML without further notice.
gml:id ID optional
Database handle for the object. It is of XML type ID, so is constrained to be unique in the XML document within which it occurs. An external identifier for the object in the form of a URI may be constructed using standard XML and XPointer methods. This is done by concatenating the URI for the document, a fragment separator, and the value of the id attribute.
orientation gml:SignType + optional
If the orientation is "+", then the OrientableCurve is identical to the baseCurve. If the orientation is "-", then the OrientableCurve is related to another _Curve with a parameterization that reverses the sense of the curve traversal. "+" is the default value.
srsDimension positiveInteger optional
The "srsDimension" is the length of coordinate sequence (the number of entries in the list). This dimension is specified by the coordinate reference system. When the srsName attribute is omitted, this attribute shall be omitted.
srsName anyURI optional
In general this reference points to a CRS instance of gml:CoordinateReferenceSystemType (see coordinateReferenceSystems.xsd). For well known references it is not required that the CRS description exists at the location the URI points to. If no srsName attribute is given, the CRS must be specified as part of the larger context this geometry element is part of, e.g. a geometric element like point, curve, etc. It is expected that this attribute will be specified at the direct position level only in rare cases.
uomLabels gml:NCNameList optional
Ordered list of unit of measure (uom) labels for all the axes of this CRS. The value of the string in the gml:catalogSymbol should be used for this uom labels, after spaces and forbiddden characters are removed. When the axisLabels attribute is included, this attribute shall also be included. When the axisLabels attribute is omitted, this attribute shall also be omitted.
Source
<complexType name="OrientableCurveType">
  <annotation>
    <documentation>OrientableCurve consists of a curve and an orientation. If the orientation is "+", then the OrientableCurve is identical to the baseCurve. If the orientation is "-", then the OrientableCurve is related to another _Curve with a parameterization that reverses the sense of the curve traversal.</documentation>
  </annotation>
  <complexContent>
    <extension base="gml:AbstractCurveType">
      <sequence>
        <element ref="gml:baseCurve">
          <annotation>
            <documentation>References or contains the base curve (positive orientation).
NOTE: This definition allows for a nested structure, i.e. an OrientableCurve may use another OrientableCurve as its base curve.</documentation>
          </annotation>
        </element>
      </sequence>
      <attribute name="orientation" type="gml:SignType" default="+">
        <annotation>
          <documentation>If the orientation is "+", then the OrientableCurve is identical to the baseCurve. If the orientation is "-", then the OrientableCurve is related to another _Curve with a parameterization that reverses the sense of the curve traversal. "+" is the default value.</documentation>
        </annotation>
      </attribute>
    </extension>
  </complexContent>
</complexType>
Complex Type gml:LineStringSegmentType
Namespace http://www.opengis.net/gml
Annotations
A LineStringSegment is a curve segment that is defined by two or more coordinate tuples, with linear interpolation between them. Note: LineStringSegment implements GM_LineString of ISO 19107.
Diagram
Diagram index5.tmp#id1652 index5.tmp#id1653 index5.tmp#id1654 index5.tmp#id1651 index5.tmp#id1659 index6.tmp#id772 index6.tmp#id720 index6.tmp#id791 index6.tmp#id792 index6.tmp#id775
Type extension of gml:AbstractCurveSegmentType
Type hierarchy
Used by
Model (gml:pos | gml:pointProperty | gml:pointRep | gml:posList | gml:coordinates)
Children gml:coordinates, gml:pointProperty, gml:pointRep, gml:pos, gml:posList
Attributes
QName Type Fixed Default Use Annotation
interpolation gml:CurveInterpolationType linear optional
The attribute "interpolation" specifies the curve interpolation mechanism used for this segment. This mechanism uses the control points and control parameters to determine the position of this curve segment. For a LineStringSegment the interpolation is fixed as "linear".
numDerivativeInterior integer 0 optional
The attribute "numDerivativesInterior" specifies the type of continuity that is guaranteed interior to the curve. The default value of "0" means simple continuity, which is a mandatory minimum level of continuity. This level is referred to as "C 0 " in mathematical texts. A value of 1 means that the function and its first derivative are continuous at the appropriate end point: "C 1 " continuity. A value of "n" for any integer means the function and its first n derivatives are continuous: "C n " continuity. NOTE: Use of these values is only appropriate when the basic curve definition is an underdetermined system. For example, line string segments cannot support continuity above C 0 , since there is no spare control parameter to adjust the incoming angle at the end points of the segment. Spline functions on the other hand often have extra degrees of freedom on end segments that allow them to adjust the values of the derivatives to support C 1 or higher continuity.
numDerivativesAtEnd integer 0 optional
The attribute "numDerivativesAtEnd" specifies the type of continuity between this curve segment and its successor. If this is the last curve segment in the curve, one of these values, as appropriate, is ignored. The default value of "0" means simple continuity, which is a mandatory minimum level of continuity. This level is referred to as "C 0 " in mathematical texts. A value of 1 means that the function and its first derivative are continuous at the appropriate end point: "C 1 " continuity. A value of "n" for any integer means the function and its first n derivatives are continuous: "C n " continuity. NOTE: Use of these values is only appropriate when the basic curve definition is an underdetermined system. For example, line string segments cannot support continuity above C 0 , since there is no spare control parameter to adjust the incoming angle at the end points of the segment. Spline functions on the other hand often have extra degrees of freedom on end segments that allow them to adjust the values of the derivatives to support C 1 or higher continuity.
numDerivativesAtStart integer 0 optional
The attribute "numDerivativesAtStart" specifies the type of continuity between this curve segment and its predecessor. If this is the first curve segment in the curve, one of these values, as appropriate, is ignored. The default value of "0" means simple continuity, which is a mandatory minimum level of continuity. This level is referred to as "C 0 " in mathematical texts. A value of 1 means that the function and its first derivative are continuous at the appropriate end point: "C 1 " continuity. A value of "n" for any integer means the function and its first n derivatives are continuous: "C n " continuity. NOTE: Use of these values is only appropriate when the basic curve definition is an underdetermined system. For example, line string segments cannot support continuity above C 0 , since there is no spare control parameter to adjust the incoming angle at the end points of the segment. Spline functions on the other hand often have extra degrees of freedom on end segments that allow them to adjust the values of the derivatives to support C 1 or higher continuity.
Source
<complexType name="LineStringSegmentType">
  <annotation>
    <documentation>A LineStringSegment is a curve segment that is defined by two or more coordinate tuples, with linear interpolation between them.
				Note: LineStringSegment implements GM_LineString of ISO 19107.</documentation>
  </annotation>
  <complexContent>
    <extension base="gml:AbstractCurveSegmentType">
      <sequence>
        <choice>
          <annotation>
            <documentation>GML supports two different ways to specify the control points of a curve segment.
1. A sequence of "pos" (DirectPositionType) or "pointProperty" (PointPropertyType) elements. "pos" elements are control points that are only part of this curve segment, "pointProperty" elements contain a point that may be referenced from other geometry elements or reference another point defined outside of this curve segment (reuse of existing points).
2. The "posList" element allows for a compact way to specifiy the coordinates of the control points, if all control points are in the same coordinate reference systems and belong to this curve segment only. The number of direct positions in the list must be at least two.</documentation>
          </annotation>
          <choice minOccurs="2" maxOccurs="unbounded">
            <element ref="gml:pos"/>
            <element ref="gml:pointProperty"/>
            <element ref="gml:pointRep">
              <annotation>
                <documentation>Deprecated with GML version 3.1.0. Use "pointProperty" instead. Included for backwards compatibility with GML 3.0.0.</documentation>
              </annotation>
            </element>
          </choice>
          <element ref="gml:posList"/>
          <element ref="gml:coordinates">
            <annotation>
              <documentation>Deprecated with GML version 3.1.0. Use "posList" instead.</documentation>
            </annotation>
          </element>
        </choice>
      </sequence>
      <attribute name="interpolation" type="gml:CurveInterpolationType" fixed="linear">
        <annotation>
          <documentation>The attribute "interpolation" specifies the curve interpolation mechanism used for this segment. This mechanism
uses the control points and control parameters to determine the position of this curve segment. For a LineStringSegment the interpolation is fixed as "linear".</documentation>
        </annotation>
      </attribute>
    </extension>
  </complexContent>
</complexType>
Simple Type gml:CurveInterpolationType
Namespace http://www.opengis.net/gml
Annotations
CurveInterpolationType is a list of codes that may be used to identify the interpolation mechanisms specified by an application schema.
Diagram
Diagram
Type restriction of string
Facets
enumeration linear
enumeration geodesic
enumeration circularArc3Points
enumeration circularArc2PointWithBulge
enumeration circularArcCenterPointWithRadius
enumeration elliptical
enumeration clothoid
enumeration conic
enumeration polynomialSpline
enumeration cubicSpline
enumeration rationalSpline
Used by
Source
<simpleType name="CurveInterpolationType">
  <annotation>
    <documentation>CurveInterpolationType is a list of codes that may be used to identify the interpolation mechanisms specified by an
application schema.</documentation>
  </annotation>
  <restriction base="string">
    <enumeration value="linear"/>
    <enumeration value="geodesic"/>
    <enumeration value="circularArc3Points"/>
    <enumeration value="circularArc2PointWithBulge"/>
    <enumeration value="circularArcCenterPointWithRadius"/>
    <enumeration value="elliptical"/>
    <enumeration value="clothoid"/>
    <enumeration value="conic"/>
    <enumeration value="polynomialSpline"/>
    <enumeration value="cubicSpline"/>
    <enumeration value="rationalSpline"/>
  </restriction>
</simpleType>
Complex Type gml:ArcStringType
Namespace http://www.opengis.net/gml
Annotations
An ArcString is a curve segment that uses three-point circular arc interpolation.
Diagram
Diagram index5.tmp#id1652 index5.tmp#id1653 index5.tmp#id1654 index5.tmp#id1651 index5.tmp#id1662 index5.tmp#id1663 index6.tmp#id772 index6.tmp#id720 index6.tmp#id791 index6.tmp#id792 index6.tmp#id775
Type extension of gml:AbstractCurveSegmentType
Type hierarchy
Used by
Element gml:ArcString
Complex Type gml:ArcType
Model (gml:pos | gml:pointProperty | gml:pointRep | gml:posList | gml:coordinates)
Children gml:coordinates, gml:pointProperty, gml:pointRep, gml:pos, gml:posList
Attributes
QName Type Fixed Default Use Annotation
interpolation gml:CurveInterpolationType circularArc3Points optional
The attribute "interpolation" specifies the curve interpolation mechanism used for this segment. This mechanism uses the control points and control parameters to determine the position of this curve segment. For an ArcString the interpolation is fixed as "circularArc3Points".
numArc integer optional
The number of arcs in the arc string can be explicitly stated in this attribute. The number of control points in the arc string must be 2 * numArc + 1.
numDerivativeInterior integer 0 optional
The attribute "numDerivativesInterior" specifies the type of continuity that is guaranteed interior to the curve. The default value of "0" means simple continuity, which is a mandatory minimum level of continuity. This level is referred to as "C 0 " in mathematical texts. A value of 1 means that the function and its first derivative are continuous at the appropriate end point: "C 1 " continuity. A value of "n" for any integer means the function and its first n derivatives are continuous: "C n " continuity. NOTE: Use of these values is only appropriate when the basic curve definition is an underdetermined system. For example, line string segments cannot support continuity above C 0 , since there is no spare control parameter to adjust the incoming angle at the end points of the segment. Spline functions on the other hand often have extra degrees of freedom on end segments that allow them to adjust the values of the derivatives to support C 1 or higher continuity.
numDerivativesAtEnd integer 0 optional
The attribute "numDerivativesAtEnd" specifies the type of continuity between this curve segment and its successor. If this is the last curve segment in the curve, one of these values, as appropriate, is ignored. The default value of "0" means simple continuity, which is a mandatory minimum level of continuity. This level is referred to as "C 0 " in mathematical texts. A value of 1 means that the function and its first derivative are continuous at the appropriate end point: "C 1 " continuity. A value of "n" for any integer means the function and its first n derivatives are continuous: "C n " continuity. NOTE: Use of these values is only appropriate when the basic curve definition is an underdetermined system. For example, line string segments cannot support continuity above C 0 , since there is no spare control parameter to adjust the incoming angle at the end points of the segment. Spline functions on the other hand often have extra degrees of freedom on end segments that allow them to adjust the values of the derivatives to support C 1 or higher continuity.
numDerivativesAtStart integer 0 optional
The attribute "numDerivativesAtStart" specifies the type of continuity between this curve segment and its predecessor. If this is the first curve segment in the curve, one of these values, as appropriate, is ignored. The default value of "0" means simple continuity, which is a mandatory minimum level of continuity. This level is referred to as "C 0 " in mathematical texts. A value of 1 means that the function and its first derivative are continuous at the appropriate end point: "C 1 " continuity. A value of "n" for any integer means the function and its first n derivatives are continuous: "C n " continuity. NOTE: Use of these values is only appropriate when the basic curve definition is an underdetermined system. For example, line string segments cannot support continuity above C 0 , since there is no spare control parameter to adjust the incoming angle at the end points of the segment. Spline functions on the other hand often have extra degrees of freedom on end segments that allow them to adjust the values of the derivatives to support C 1 or higher continuity.
Source
<complexType name="ArcStringType">
  <annotation>
    <documentation>An ArcString is a curve segment that uses three-point circular arc interpolation.</documentation>
  </annotation>
  <complexContent>
    <extension base="gml:AbstractCurveSegmentType">
      <sequence>
        <choice>
          <annotation>
            <documentation>GML supports two different ways to specify the control points of a curve segment.
1. A sequence of "pos" (DirectPositionType) or "pointProperty" (PointPropertyType) elements. "pos" elements are control points that are only part of this curve segment, "pointProperty" elements contain a point that may be referenced from other geometry elements or reference another point defined outside of this curve segment (reuse of existing points).
2. The "posList" element allows for a compact way to specifiy the coordinates of the control points, if all control points are in the same coordinate reference systems and belong to this curve segment only. The number of direct positions in the list must be at least three.</documentation>
          </annotation>
          <choice minOccurs="3" maxOccurs="unbounded">
            <element ref="gml:pos"/>
            <element ref="gml:pointProperty"/>
            <element ref="gml:pointRep">
              <annotation>
                <documentation>Deprecated with GML version 3.1.0. Use "pointProperty" instead. Included for backwards compatibility with GML 3.0.0.</documentation>
              </annotation>
            </element>
          </choice>
          <element ref="gml:posList"/>
          <element ref="gml:coordinates">
            <annotation>
              <documentation>Deprecated with GML version 3.1.0. Use "posList" instead.</documentation>
            </annotation>
          </element>
        </choice>
      </sequence>
      <attribute name="interpolation" type="gml:CurveInterpolationType" fixed="circularArc3Points">
        <annotation>
          <documentation>The attribute "interpolation" specifies the curve interpolation mechanism used for this segment. This mechanism
uses the control points and control parameters to determine the position of this curve segment. For an ArcString the interpolation is fixed as "circularArc3Points".</documentation>
        </annotation>
      </attribute>
      <attribute name="numArc" type="integer" use="optional">
        <annotation>
          <documentation>The number of arcs in the arc string can be explicitly stated in this attribute. The number of control points in the arc string must be 2 * numArc + 1.</documentation>
        </annotation>
      </attribute>
    </extension>
  </complexContent>
</complexType>
Complex Type gml:ArcType
Namespace http://www.opengis.net/gml
Annotations
An Arc is an arc string with only one arc unit, i.e. three control points.
Diagram
Diagram index5.tmp#id1652 index5.tmp#id1653 index5.tmp#id1654 index5.tmp#id1651 index5.tmp#id1662 index5.tmp#id1663 index6.tmp#id772 index6.tmp#id720 index6.tmp#id791 index6.tmp#id792 index6.tmp#id775 index5.tmp#id1661 index5.tmp#id1665 index6.tmp#id772 index6.tmp#id720 index6.tmp#id791 index6.tmp#id792 index6.tmp#id775
Type restriction of gml:ArcStringType
Type hierarchy
Used by
Element gml:Arc
Complex Type gml:CircleType
Model (gml:pos | gml:pointProperty | gml:pointRep | gml:posList | gml:coordinates)
Children gml:coordinates, gml:pointProperty, gml:pointRep, gml:pos, gml:posList
Attributes
QName Type Fixed Default Use Annotation
interpolation gml:CurveInterpolationType circularArc3Points optional
The attribute "interpolation" specifies the curve interpolation mechanism used for this segment. This mechanism uses the control points and control parameters to determine the position of this curve segment. For an ArcString the interpolation is fixed as "circularArc3Points".
numArc integer 1 optional
An arc is an arc string consiting of a single arc, the attribute is fixed to "1".
numDerivativeInterior integer 0 optional
The attribute "numDerivativesInterior" specifies the type of continuity that is guaranteed interior to the curve. The default value of "0" means simple continuity, which is a mandatory minimum level of continuity. This level is referred to as "C 0 " in mathematical texts. A value of 1 means that the function and its first derivative are continuous at the appropriate end point: "C 1 " continuity. A value of "n" for any integer means the function and its first n derivatives are continuous: "C n " continuity. NOTE: Use of these values is only appropriate when the basic curve definition is an underdetermined system. For example, line string segments cannot support continuity above C 0 , since there is no spare control parameter to adjust the incoming angle at the end points of the segment. Spline functions on the other hand often have extra degrees of freedom on end segments that allow them to adjust the values of the derivatives to support C 1 or higher continuity.
numDerivativesAtEnd integer 0 optional
The attribute "numDerivativesAtEnd" specifies the type of continuity between this curve segment and its successor. If this is the last curve segment in the curve, one of these values, as appropriate, is ignored. The default value of "0" means simple continuity, which is a mandatory minimum level of continuity. This level is referred to as "C 0 " in mathematical texts. A value of 1 means that the function and its first derivative are continuous at the appropriate end point: "C 1 " continuity. A value of "n" for any integer means the function and its first n derivatives are continuous: "C n " continuity. NOTE: Use of these values is only appropriate when the basic curve definition is an underdetermined system. For example, line string segments cannot support continuity above C 0 , since there is no spare control parameter to adjust the incoming angle at the end points of the segment. Spline functions on the other hand often have extra degrees of freedom on end segments that allow them to adjust the values of the derivatives to support C 1 or higher continuity.
numDerivativesAtStart integer 0 optional
The attribute "numDerivativesAtStart" specifies the type of continuity between this curve segment and its predecessor. If this is the first curve segment in the curve, one of these values, as appropriate, is ignored. The default value of "0" means simple continuity, which is a mandatory minimum level of continuity. This level is referred to as "C 0 " in mathematical texts. A value of 1 means that the function and its first derivative are continuous at the appropriate end point: "C 1 " continuity. A value of "n" for any integer means the function and its first n derivatives are continuous: "C n " continuity. NOTE: Use of these values is only appropriate when the basic curve definition is an underdetermined system. For example, line string segments cannot support continuity above C 0 , since there is no spare control parameter to adjust the incoming angle at the end points of the segment. Spline functions on the other hand often have extra degrees of freedom on end segments that allow them to adjust the values of the derivatives to support C 1 or higher continuity.
Source
<complexType name="ArcType">
  <annotation>
    <documentation>An Arc is an arc string with only one arc unit, i.e. three control points.</documentation>
  </annotation>
  <complexContent>
    <restriction base="gml:ArcStringType">
      <sequence>
        <choice>
          <annotation>
            <documentation>GML supports two different ways to specify the control points of a curve segment.
1. A sequence of "pos" (DirectPositionType) or "pointProperty" (PointPropertyType) elements. "pos" elements are control points that are only part of this curve segment, "pointProperty" elements contain a point that may be referenced from other geometry elements or reference another point defined outside of this curve segment (reuse of existing points).
2. The "posList" element allows for a compact way to specifiy the coordinates of the control points, if all control points are in the same coordinate reference systems and belong to this curve segment only. The number of direct positions in the list must be three.</documentation>
          </annotation>
          <choice minOccurs="3" maxOccurs="3">
            <element ref="gml:pos"/>
            <element ref="gml:pointProperty"/>
            <element ref="gml:pointRep">
              <annotation>
                <documentation>Deprecated with GML version 3.1.0. Use "pointProperty" instead. Included for backwards compatibility with GML 3.0.0.</documentation>
              </annotation>
            </element>
          </choice>
          <element ref="gml:posList"/>
          <element ref="gml:coordinates">
            <annotation>
              <documentation>Deprecated with GML version 3.1.0. Use "posList" instead.</documentation>
            </annotation>
          </element>
        </choice>
      </sequence>
      <attribute name="numArc" type="integer" use="optional" fixed="1">
        <annotation>
          <documentation>An arc is an arc string consiting of a single arc, the attribute is fixed to "1".</documentation>
        </annotation>
      </attribute>
    </restriction>
  </complexContent>
</complexType>
Complex Type gml:CircleType
Namespace http://www.opengis.net/gml
Annotations
A Circle is an arc whose ends coincide to form a simple closed loop. The "start" and "end" bearing are equal and shall be the bearing for the first controlPoint listed. The three control points must be distinct non-co-linear points for the Circle to be unambiguously defined. The arc is simply extended past the third control point until the first control point is encountered.
Diagram
Diagram index5.tmp#id1652 index5.tmp#id1653 index5.tmp#id1654 index5.tmp#id1651 index5.tmp#id1662 index5.tmp#id1663 index6.tmp#id772 index6.tmp#id720 index6.tmp#id791 index6.tmp#id792 index6.tmp#id775 index5.tmp#id1661 index5.tmp#id1665 index6.tmp#id772 index6.tmp#id720 index6.tmp#id791 index6.tmp#id792 index6.tmp#id775 index5.tmp#id1664
Type extension of gml:ArcType
Type hierarchy
Used by
Element gml:Circle
Model (gml:pos | gml:pointProperty | gml:pointRep | gml:posList | gml:coordinates)
Children gml:coordinates, gml:pointProperty, gml:pointRep, gml:pos, gml:posList
Attributes
QName Type Fixed Default Use Annotation
interpolation gml:CurveInterpolationType circularArc3Points optional
The attribute "interpolation" specifies the curve interpolation mechanism used for this segment. This mechanism uses the control points and control parameters to determine the position of this curve segment. For an ArcString the interpolation is fixed as "circularArc3Points".
numArc integer 1 optional
An arc is an arc string consiting of a single arc, the attribute is fixed to "1".
numDerivativeInterior integer 0 optional
The attribute "numDerivativesInterior" specifies the type of continuity that is guaranteed interior to the curve. The default value of "0" means simple continuity, which is a mandatory minimum level of continuity. This level is referred to as "C 0 " in mathematical texts. A value of 1 means that the function and its first derivative are continuous at the appropriate end point: "C 1 " continuity. A value of "n" for any integer means the function and its first n derivatives are continuous: "C n " continuity. NOTE: Use of these values is only appropriate when the basic curve definition is an underdetermined system. For example, line string segments cannot support continuity above C 0 , since there is no spare control parameter to adjust the incoming angle at the end points of the segment. Spline functions on the other hand often have extra degrees of freedom on end segments that allow them to adjust the values of the derivatives to support C 1 or higher continuity.
numDerivativesAtEnd integer 0 optional
The attribute "numDerivativesAtEnd" specifies the type of continuity between this curve segment and its successor. If this is the last curve segment in the curve, one of these values, as appropriate, is ignored. The default value of "0" means simple continuity, which is a mandatory minimum level of continuity. This level is referred to as "C 0 " in mathematical texts. A value of 1 means that the function and its first derivative are continuous at the appropriate end point: "C 1 " continuity. A value of "n" for any integer means the function and its first n derivatives are continuous: "C n " continuity. NOTE: Use of these values is only appropriate when the basic curve definition is an underdetermined system. For example, line string segments cannot support continuity above C 0 , since there is no spare control parameter to adjust the incoming angle at the end points of the segment. Spline functions on the other hand often have extra degrees of freedom on end segments that allow them to adjust the values of the derivatives to support C 1 or higher continuity.
numDerivativesAtStart integer 0 optional
The attribute "numDerivativesAtStart" specifies the type of continuity between this curve segment and its predecessor. If this is the first curve segment in the curve, one of these values, as appropriate, is ignored. The default value of "0" means simple continuity, which is a mandatory minimum level of continuity. This level is referred to as "C 0 " in mathematical texts. A value of 1 means that the function and its first derivative are continuous at the appropriate end point: "C 1 " continuity. A value of "n" for any integer means the function and its first n derivatives are continuous: "C n " continuity. NOTE: Use of these values is only appropriate when the basic curve definition is an underdetermined system. For example, line string segments cannot support continuity above C 0 , since there is no spare control parameter to adjust the incoming angle at the end points of the segment. Spline functions on the other hand often have extra degrees of freedom on end segments that allow them to adjust the values of the derivatives to support C 1 or higher continuity.
Source
<complexType name="CircleType">
  <annotation>
    <documentation>A Circle is an arc whose ends coincide to form a simple closed loop. The "start" and "end" bearing are equal and shall be the bearing for the first controlPoint listed. The three control points must be distinct non-co-linear points for the Circle to be unambiguously defined. The arc is simply extended past the third control point until the first control point is encountered.</documentation>
  </annotation>
  <complexContent>
    <extension base="gml:ArcType"/>
  </complexContent>
</complexType>
Complex Type gml:ArcStringByBulgeType
Namespace http://www.opengis.net/gml
Annotations
This variant of the arc computes the mid points of the arcs instead of storing the coordinates directly. The control point sequence consists of the start and end points of each arc plus the bulge.
Diagram
Diagram index5.tmp#id1652 index5.tmp#id1653 index5.tmp#id1654 index5.tmp#id1651 index5.tmp#id1670 index5.tmp#id1671 index6.tmp#id772 index6.tmp#id720 index6.tmp#id791 index6.tmp#id792 index6.tmp#id775 index5.tmp#id1668 index5.tmp#id1669
Type extension of gml:AbstractCurveSegmentType
Type hierarchy
Used by
Model (gml:pos | gml:pointProperty | gml:pointRep | gml:posList | gml:coordinates) , gml:bulge+ , gml:normal+
Children gml:bulge, gml:coordinates, gml:normal, gml:pointProperty, gml:pointRep, gml:pos, gml:posList
Attributes
QName Type Fixed Default Use Annotation
interpolation gml:CurveInterpolationType circularArc2PointWithBulge optional
The attribute "interpolation" specifies the curve interpolation mechanism used for this segment. This mechanism uses the control points and control parameters to determine the position of this curve segment. For an ArcStringByBulge the interpolation is fixed as "circularArc2PointWithBulge".
numArc integer optional
The number of arcs in the arc string can be explicitly stated in this attribute. The number of control points in the arc string must be numArc + 1.
numDerivativeInterior integer 0 optional
The attribute "numDerivativesInterior" specifies the type of continuity that is guaranteed interior to the curve. The default value of "0" means simple continuity, which is a mandatory minimum level of continuity. This level is referred to as "C 0 " in mathematical texts. A value of 1 means that the function and its first derivative are continuous at the appropriate end point: "C 1 " continuity. A value of "n" for any integer means the function and its first n derivatives are continuous: "C n " continuity. NOTE: Use of these values is only appropriate when the basic curve definition is an underdetermined system. For example, line string segments cannot support continuity above C 0 , since there is no spare control parameter to adjust the incoming angle at the end points of the segment. Spline functions on the other hand often have extra degrees of freedom on end segments that allow them to adjust the values of the derivatives to support C 1 or higher continuity.
numDerivativesAtEnd integer 0 optional
The attribute "numDerivativesAtEnd" specifies the type of continuity between this curve segment and its successor. If this is the last curve segment in the curve, one of these values, as appropriate, is ignored. The default value of "0" means simple continuity, which is a mandatory minimum level of continuity. This level is referred to as "C 0 " in mathematical texts. A value of 1 means that the function and its first derivative are continuous at the appropriate end point: "C 1 " continuity. A value of "n" for any integer means the function and its first n derivatives are continuous: "C n " continuity. NOTE: Use of these values is only appropriate when the basic curve definition is an underdetermined system. For example, line string segments cannot support continuity above C 0 , since there is no spare control parameter to adjust the incoming angle at the end points of the segment. Spline functions on the other hand often have extra degrees of freedom on end segments that allow them to adjust the values of the derivatives to support C 1 or higher continuity.
numDerivativesAtStart integer 0 optional
The attribute "numDerivativesAtStart" specifies the type of continuity between this curve segment and its predecessor. If this is the first curve segment in the curve, one of these values, as appropriate, is ignored. The default value of "0" means simple continuity, which is a mandatory minimum level of continuity. This level is referred to as "C 0 " in mathematical texts. A value of 1 means that the function and its first derivative are continuous at the appropriate end point: "C 1 " continuity. A value of "n" for any integer means the function and its first n derivatives are continuous: "C n " continuity. NOTE: Use of these values is only appropriate when the basic curve definition is an underdetermined system. For example, line string segments cannot support continuity above C 0 , since there is no spare control parameter to adjust the incoming angle at the end points of the segment. Spline functions on the other hand often have extra degrees of freedom on end segments that allow them to adjust the values of the derivatives to support C 1 or higher continuity.
Source
<complexType name="ArcStringByBulgeType">
  <annotation>
    <documentation>This variant of the arc computes the mid points of the arcs instead of storing the coordinates directly. The control point sequence consists of the start and end points of each arc plus the bulge.</documentation>
  </annotation>
  <complexContent>
    <extension base="gml:AbstractCurveSegmentType">
      <sequence>
        <choice>
          <annotation>
            <documentation>GML supports two different ways to specify the control points of a curve segment.
1. A sequence of "pos" (DirectPositionType) or "pointProperty" (PointPropertyType) elements. "pos" elements are control points that are only part of this curve segment, "pointProperty" elements contain a point that may be referenced from other geometry elements or reference another point defined outside of this curve segment (reuse of existing points).
2. The "posList" element allows for a compact way to specifiy the coordinates of the control points, if all control points are in the same coordinate reference systems and belong to this curve segment only. The number of direct positions in the list must be at least two.</documentation>
          </annotation>
          <choice minOccurs="2" maxOccurs="unbounded">
            <element ref="gml:pos"/>
            <element ref="gml:pointProperty"/>
            <element ref="gml:pointRep">
              <annotation>
                <documentation>Deprecated with GML version 3.1.0. Use "pointProperty" instead. Included for backwards compatibility with GML 3.0.0.</documentation>
              </annotation>
            </element>
          </choice>
          <element ref="gml:posList"/>
          <element ref="gml:coordinates">
            <annotation>
              <documentation>Deprecated with GML version 3.1.0. Use "posList" instead.</documentation>
            </annotation>
          </element>
        </choice>
        <element name="bulge" type="double" maxOccurs="unbounded">
          <annotation>
            <documentation>The bulge controls the offset of each arc's midpoint. The "bulge" is the real number multiplier for the normal that determines the offset direction of the midpoint of each arc. The length of the bulge sequence is exactly 1 less than the length of the control point array, since a bulge is needed for each pair of adjacent points in the control point array. The bulge is not given by a distance, since it is simply a multiplier for the normal.
The midpoint of the resulting arc is given by: midPoint = ((startPoint + endPoint)/2.0) + bulge*normal</documentation>
          </annotation>
        </element>
        <element name="normal" type="gml:VectorType" maxOccurs="unbounded">
          <annotation>
            <documentation>The attribute "normal" is a vector normal (perpendicular) to the chord of the arc, the line joining the first and last
point of the arc. In a 2D coordinate system, there are only two possible directions for the normal, and it is often given as a signed real, indicating its length, with a positive sign indicating a left turn angle from the chord line, and a negative sign indicating a right turn from the chord. In 3D, the normal determines the plane of the arc, along with the start and endPoint of the arc.
The normal is usually a unit vector, but this is not absolutely necessary. If the normal is a zero vector, the geometric object becomes equivalent to the straight line between the two end points. The length of the normal sequence is exactly the same as for the bulge sequence, 1 less than the control point sequence length.</documentation>
          </annotation>
        </element>
      </sequence>
      <attribute name="interpolation" type="gml:CurveInterpolationType" fixed="circularArc2PointWithBulge">
        <annotation>
          <documentation>The attribute "interpolation" specifies the curve interpolation mechanism used for this segment. This mechanism
uses the control points and control parameters to determine the position of this curve segment. For an ArcStringByBulge the interpolation is fixed as "circularArc2PointWithBulge".</documentation>
        </annotation>
      </attribute>
      <attribute name="numArc" type="integer" use="optional">
        <annotation>
          <documentation>The number of arcs in the arc string can be explicitly stated in this attribute. The number of control points in the arc string must be numArc + 1.</documentation>
        </annotation>
      </attribute>
    </extension>
  </complexContent>
</complexType>
Complex Type gml:ArcByBulgeType
Namespace http://www.opengis.net/gml
Annotations
An ArcByBulge is an arc string with only one arc unit, i.e. two control points and one bulge.
Diagram
Diagram index5.tmp#id1652 index5.tmp#id1653 index5.tmp#id1654 index5.tmp#id1651 index5.tmp#id1670 index5.tmp#id1671 index6.tmp#id772 index6.tmp#id720 index6.tmp#id791 index6.tmp#id792 index6.tmp#id775 index5.tmp#id1668 index5.tmp#id1669 index5.tmp#id1667 index5.tmp#id1675 index6.tmp#id772 index6.tmp#id720 index6.tmp#id791 index6.tmp#id792 index6.tmp#id775 index5.tmp#id1673 index5.tmp#id1674
Type restriction of gml:ArcStringByBulgeType
Type hierarchy
Used by
Element gml:ArcByBulge
Model (gml:pos | gml:pointProperty | gml:pointRep | gml:posList | gml:coordinates) , gml:bulge , gml:normal
Children gml:bulge, gml:coordinates, gml:normal, gml:pointProperty, gml:pointRep, gml:pos, gml:posList
Attributes
QName Type Fixed Default Use Annotation
interpolation gml:CurveInterpolationType circularArc2PointWithBulge optional
The attribute "interpolation" specifies the curve interpolation mechanism used for this segment. This mechanism uses the control points and control parameters to determine the position of this curve segment. For an ArcStringByBulge the interpolation is fixed as "circularArc2PointWithBulge".
numArc integer 1 optional
An arc is an arc string consiting of a single arc, the attribute is fixed to "1".
numDerivativeInterior integer 0 optional
The attribute "numDerivativesInterior" specifies the type of continuity that is guaranteed interior to the curve. The default value of "0" means simple continuity, which is a mandatory minimum level of continuity. This level is referred to as "C 0 " in mathematical texts. A value of 1 means that the function and its first derivative are continuous at the appropriate end point: "C 1 " continuity. A value of "n" for any integer means the function and its first n derivatives are continuous: "C n " continuity. NOTE: Use of these values is only appropriate when the basic curve definition is an underdetermined system. For example, line string segments cannot support continuity above C 0 , since there is no spare control parameter to adjust the incoming angle at the end points of the segment. Spline functions on the other hand often have extra degrees of freedom on end segments that allow them to adjust the values of the derivatives to support C 1 or higher continuity.
numDerivativesAtEnd integer 0 optional
The attribute "numDerivativesAtEnd" specifies the type of continuity between this curve segment and its successor. If this is the last curve segment in the curve, one of these values, as appropriate, is ignored. The default value of "0" means simple continuity, which is a mandatory minimum level of continuity. This level is referred to as "C 0 " in mathematical texts. A value of 1 means that the function and its first derivative are continuous at the appropriate end point: "C 1 " continuity. A value of "n" for any integer means the function and its first n derivatives are continuous: "C n " continuity. NOTE: Use of these values is only appropriate when the basic curve definition is an underdetermined system. For example, line string segments cannot support continuity above C 0 , since there is no spare control parameter to adjust the incoming angle at the end points of the segment. Spline functions on the other hand often have extra degrees of freedom on end segments that allow them to adjust the values of the derivatives to support C 1 or higher continuity.
numDerivativesAtStart integer 0 optional
The attribute "numDerivativesAtStart" specifies the type of continuity between this curve segment and its predecessor. If this is the first curve segment in the curve, one of these values, as appropriate, is ignored. The default value of "0" means simple continuity, which is a mandatory minimum level of continuity. This level is referred to as "C 0 " in mathematical texts. A value of 1 means that the function and its first derivative are continuous at the appropriate end point: "C 1 " continuity. A value of "n" for any integer means the function and its first n derivatives are continuous: "C n " continuity. NOTE: Use of these values is only appropriate when the basic curve definition is an underdetermined system. For example, line string segments cannot support continuity above C 0 , since there is no spare control parameter to adjust the incoming angle at the end points of the segment. Spline functions on the other hand often have extra degrees of freedom on end segments that allow them to adjust the values of the derivatives to support C 1 or higher continuity.
Source
<complexType name="ArcByBulgeType">
  <annotation>
    <documentation>An ArcByBulge is an arc string with only one arc unit, i.e. two control points and one bulge.</documentation>
  </annotation>
  <complexContent>
    <restriction base="gml:ArcStringByBulgeType">
      <sequence>
        <choice>
          <annotation>
            <documentation>GML supports two different ways to specify the control points of a curve segment.
1. A sequence of "pos" (DirectPositionType) or "pointProperty" (PointPropertyType) elements. "pos" elements are control points that are only part of this curve segment, "pointProperty" elements contain a point that may be referenced from other geometry elements or reference another point defined outside of this curve segment (reuse of existing points).
2. The "posList" element allows for a compact way to specifiy the coordinates of the control points, if all control points are in the same coordinate reference systems and belong to this curve segment only. The number of direct positions in the list must be two.</documentation>
          </annotation>
          <choice minOccurs="2" maxOccurs="2">
            <element ref="gml:pos"/>
            <element ref="gml:pointProperty"/>
            <element ref="gml:pointRep">
              <annotation>
                <documentation>Deprecated with GML version 3.1.0. Use "pointProperty" instead. Included for backwards compatibility with GML 3.0.0.</documentation>
              </annotation>
            </element>
          </choice>
          <element ref="gml:posList"/>
          <element ref="gml:coordinates">
            <annotation>
              <documentation>Deprecated with GML version 3.1.0. Use "posList" instead.</documentation>
            </annotation>
          </element>
        </choice>
        <element name="bulge" type="double">
          <annotation>
            <documentation>The bulge controls the offset of each arc's midpoint. The "bulge" is the real number multiplier for the normal that determines the offset direction of the midpoint of each arc. The length of the bulge sequence is exactly 1 less than the length of the control point array, since a bulge is needed for each pair of adjacent points in the control point array. The bulge is not given by a distance, since it is simply a multiplier for the normal.
The midpoint of the resulting arc is given by: midPoint = ((startPoint + endPoint)/2.0) + bulge*normal</documentation>
          </annotation>
        </element>
        <element name="normal" type="gml:VectorType">
          <annotation>
            <documentation>The attribute "normal" is a vector normal (perpendicular) to the chord of the arc, the line joining the first and last
point of the arc. In a 2D coordinate system, there are only two possible directions for the normal, and it is often given as a signed real, indicating its length, with a positive sign indicating a left turn angle from the chord line, and a negative sign indicating a right turn from the chord. In 3D, the normal determines the plane of the arc, along with the start and endPoint of the arc.
The normal is usually a unit vector, but this is not absolutely necessary. If the normal is a zero vector, the geometric object becomes equivalent to the straight line between the two end points. The length of the normal sequence is exactly the same as for the bulge sequence, 1 less than the control point sequence length.</documentation>
          </annotation>
        </element>
      </sequence>
      <attribute name="numArc" type="integer" use="optional" fixed="1">
        <annotation>
          <documentation>An arc is an arc string consiting of a single arc, the attribute is fixed to "1".</documentation>
        </annotation>
      </attribute>
    </restriction>
  </complexContent>
</complexType>
Complex Type gml:ArcByCenterPointType
Namespace http://www.opengis.net/gml
Annotations
This variant of the arc requires that the points on the arc have to be computed instead of storing the coordinates directly. The control point is the center point of the arc plus the radius and the bearing at start and end. This represenation can be used only in 2D.
Diagram
Diagram index5.tmp#id1652 index5.tmp#id1653 index5.tmp#id1654 index5.tmp#id1651 index5.tmp#id1680 index5.tmp#id1681 index6.tmp#id772 index6.tmp#id720 index6.tmp#id791 index6.tmp#id792 index6.tmp#id775 index5.tmp#id1677 index5.tmp#id1678 index5.tmp#id1679
Type extension of gml:AbstractCurveSegmentType
Type hierarchy
Used by
Model (gml:pos | gml:pointProperty | gml:pointRep | gml:posList | gml:coordinates) , gml:radius , gml:startAngle{0,1} , gml:endAngle{0,1}
Children gml:coordinates, gml:endAngle, gml:pointProperty, gml:pointRep, gml:pos, gml:posList, gml:radius, gml:startAngle
Attributes
QName Type Fixed Default Use Annotation
interpolation gml:CurveInterpolationType circularArcCenterPointWithRadius optional
The attribute "interpolation" specifies the curve interpolation mechanism used for this segment. This mechanism uses the control points and control parameters to determine the position of this curve segment. For an ArcByCenterPoint the interpolation is fixed as "circularArcCenterPointWithRadius".
numArc integer 1 required
Since this type describes always a single arc, the attribute is fixed to "1".
numDerivativeInterior integer 0 optional
The attribute "numDerivativesInterior" specifies the type of continuity that is guaranteed interior to the curve. The default value of "0" means simple continuity, which is a mandatory minimum level of continuity. This level is referred to as "C 0 " in mathematical texts. A value of 1 means that the function and its first derivative are continuous at the appropriate end point: "C 1 " continuity. A value of "n" for any integer means the function and its first n derivatives are continuous: "C n " continuity. NOTE: Use of these values is only appropriate when the basic curve definition is an underdetermined system. For example, line string segments cannot support continuity above C 0 , since there is no spare control parameter to adjust the incoming angle at the end points of the segment. Spline functions on the other hand often have extra degrees of freedom on end segments that allow them to adjust the values of the derivatives to support C 1 or higher continuity.
numDerivativesAtEnd integer 0 optional
The attribute "numDerivativesAtEnd" specifies the type of continuity between this curve segment and its successor. If this is the last curve segment in the curve, one of these values, as appropriate, is ignored. The default value of "0" means simple continuity, which is a mandatory minimum level of continuity. This level is referred to as "C 0 " in mathematical texts. A value of 1 means that the function and its first derivative are continuous at the appropriate end point: "C 1 " continuity. A value of "n" for any integer means the function and its first n derivatives are continuous: "C n " continuity. NOTE: Use of these values is only appropriate when the basic curve definition is an underdetermined system. For example, line string segments cannot support continuity above C 0 , since there is no spare control parameter to adjust the incoming angle at the end points of the segment. Spline functions on the other hand often have extra degrees of freedom on end segments that allow them to adjust the values of the derivatives to support C 1 or higher continuity.
numDerivativesAtStart integer 0 optional
The attribute "numDerivativesAtStart" specifies the type of continuity between this curve segment and its predecessor. If this is the first curve segment in the curve, one of these values, as appropriate, is ignored. The default value of "0" means simple continuity, which is a mandatory minimum level of continuity. This level is referred to as "C 0 " in mathematical texts. A value of 1 means that the function and its first derivative are continuous at the appropriate end point: "C 1 " continuity. A value of "n" for any integer means the function and its first n derivatives are continuous: "C n " continuity. NOTE: Use of these values is only appropriate when the basic curve definition is an underdetermined system. For example, line string segments cannot support continuity above C 0 , since there is no spare control parameter to adjust the incoming angle at the end points of the segment. Spline functions on the other hand often have extra degrees of freedom on end segments that allow them to adjust the values of the derivatives to support C 1 or higher continuity.
Source
<complexType name="ArcByCenterPointType">
  <annotation>
    <documentation>This variant of the arc requires that the points on the arc have to be computed instead of storing the coordinates directly. The control point is the center point of the arc plus the radius and the bearing at start and end. This represenation can be used only in 2D.</documentation>
  </annotation>
  <complexContent>
    <extension base="gml:AbstractCurveSegmentType">
      <sequence>
        <choice>
          <annotation>
            <documentation>GML supports two different ways to specify the control points of a curve segment.
1. A "pos" (DirectPositionType) or "pointProperty" (PointPropertyType) element. The "pos" element contains a center point that is only part of this curve segment, a "pointProperty" element contains a point that may be referenced from other geometry elements or reference another point defined outside of this curve segment (reuse of existing points).
2. The "posList" element can be used to specifiy the coordinates of the center point, too. The number of direct positions in the list must be one.</documentation>
          </annotation>
          <choice>
            <element ref="gml:pos"/>
            <element ref="gml:pointProperty"/>
            <element ref="gml:pointRep">
              <annotation>
                <documentation>Deprecated with GML version 3.1.0. Use "pointProperty" instead. Included for backwards compatibility with GML 3.0.0.</documentation>
              </annotation>
            </element>
          </choice>
          <element ref="gml:posList"/>
          <element ref="gml:coordinates">
            <annotation>
              <documentation>Deprecated with GML version 3.1.0. Use "posList" instead.</documentation>
            </annotation>
          </element>
        </choice>
        <element name="radius" type="gml:LengthType">
          <annotation>
            <documentation>The radius of the arc.</documentation>
          </annotation>
        </element>
        <element name="startAngle" type="gml:AngleType" minOccurs="0">
          <annotation>
            <documentation>The bearing of the arc at the start.</documentation>
          </annotation>
        </element>
        <element name="endAngle" type="gml:AngleType" minOccurs="0">
          <annotation>
            <documentation>The bearing of the arc at the end.</documentation>
          </annotation>
        </element>
      </sequence>
      <attribute name="interpolation" type="gml:CurveInterpolationType" fixed="circularArcCenterPointWithRadius">
        <annotation>
          <documentation>The attribute "interpolation" specifies the curve interpolation mechanism used for this segment. This mechanism
uses the control points and control parameters to determine the position of this curve segment. For an ArcByCenterPoint the interpolation is fixed as "circularArcCenterPointWithRadius".</documentation>
        </annotation>
      </attribute>
      <attribute name="numArc" type="integer" use="required" fixed="1">
        <annotation>
          <documentation>Since this type describes always a single arc, the attribute is fixed to "1".</documentation>
        </annotation>
      </attribute>
    </extension>
  </complexContent>
</complexType>
Complex Type gml:CircleByCenterPointType
Namespace http://www.opengis.net/gml
Annotations
A CircleByCenterPoint is an ArcByCenterPoint with identical start and end angle to form a full circle. Again, this represenation can be used only in 2D.
Diagram
Diagram index5.tmp#id1652 index5.tmp#id1653 index5.tmp#id1654 index5.tmp#id1651 index5.tmp#id1680 index5.tmp#id1681 index6.tmp#id772 index6.tmp#id720 index6.tmp#id791 index6.tmp#id792 index6.tmp#id775 index5.tmp#id1677 index5.tmp#id1678 index5.tmp#id1679 index5.tmp#id1676
Type extension of gml:ArcByCenterPointType
Type hierarchy
Used by
Model (gml:pos | gml:pointProperty | gml:pointRep | gml:posList | gml:coordinates) , gml:radius , gml:startAngle{0,1} , gml:endAngle{0,1}
Children gml:coordinates, gml:endAngle, gml:pointProperty, gml:pointRep, gml:pos, gml:posList, gml:radius, gml:startAngle
Attributes
QName Type Fixed Default Use Annotation
interpolation gml:CurveInterpolationType circularArcCenterPointWithRadius optional
The attribute "interpolation" specifies the curve interpolation mechanism used for this segment. This mechanism uses the control points and control parameters to determine the position of this curve segment. For an ArcByCenterPoint the interpolation is fixed as "circularArcCenterPointWithRadius".
numArc integer 1 required
Since this type describes always a single arc, the attribute is fixed to "1".
numDerivativeInterior integer 0 optional
The attribute "numDerivativesInterior" specifies the type of continuity that is guaranteed interior to the curve. The default value of "0" means simple continuity, which is a mandatory minimum level of continuity. This level is referred to as "C 0 " in mathematical texts. A value of 1 means that the function and its first derivative are continuous at the appropriate end point: "C 1 " continuity. A value of "n" for any integer means the function and its first n derivatives are continuous: "C n " continuity. NOTE: Use of these values is only appropriate when the basic curve definition is an underdetermined system. For example, line string segments cannot support continuity above C 0 , since there is no spare control parameter to adjust the incoming angle at the end points of the segment. Spline functions on the other hand often have extra degrees of freedom on end segments that allow them to adjust the values of the derivatives to support C 1 or higher continuity.
numDerivativesAtEnd integer 0 optional
The attribute "numDerivativesAtEnd" specifies the type of continuity between this curve segment and its successor. If this is the last curve segment in the curve, one of these values, as appropriate, is ignored. The default value of "0" means simple continuity, which is a mandatory minimum level of continuity. This level is referred to as "C 0 " in mathematical texts. A value of 1 means that the function and its first derivative are continuous at the appropriate end point: "C 1 " continuity. A value of "n" for any integer means the function and its first n derivatives are continuous: "C n " continuity. NOTE: Use of these values is only appropriate when the basic curve definition is an underdetermined system. For example, line string segments cannot support continuity above C 0 , since there is no spare control parameter to adjust the incoming angle at the end points of the segment. Spline functions on the other hand often have extra degrees of freedom on end segments that allow them to adjust the values of the derivatives to support C 1 or higher continuity.
numDerivativesAtStart integer 0 optional
The attribute "numDerivativesAtStart" specifies the type of continuity between this curve segment and its predecessor. If this is the first curve segment in the curve, one of these values, as appropriate, is ignored. The default value of "0" means simple continuity, which is a mandatory minimum level of continuity. This level is referred to as "C 0 " in mathematical texts. A value of 1 means that the function and its first derivative are continuous at the appropriate end point: "C 1 " continuity. A value of "n" for any integer means the function and its first n derivatives are continuous: "C n " continuity. NOTE: Use of these values is only appropriate when the basic curve definition is an underdetermined system. For example, line string segments cannot support continuity above C 0 , since there is no spare control parameter to adjust the incoming angle at the end points of the segment. Spline functions on the other hand often have extra degrees of freedom on end segments that allow them to adjust the values of the derivatives to support C 1 or higher continuity.
Source
<complexType name="CircleByCenterPointType">
  <annotation>
    <documentation>A CircleByCenterPoint is an ArcByCenterPoint with identical start and end angle to form a full circle. Again, this represenation can be used only in 2D.</documentation>
  </annotation>
  <complexContent>
    <extension base="gml:ArcByCenterPointType"/>
  </complexContent>
</complexType>
Complex Type gml:OffsetCurveType
Namespace http://www.opengis.net/gml
Annotations
An offset curve is a curve at a constant distance from the basis curve. They can be useful as a cheap and simple alternative to constructing curves that are offsets by definition.
Diagram
Diagram index5.tmp#id1652 index5.tmp#id1653 index5.tmp#id1654 index5.tmp#id1651 index5.tmp#id1684 index5.tmp#id1685 index5.tmp#id1686
Type extension of gml:AbstractCurveSegmentType
Type hierarchy
Used by
Element gml:OffsetCurve
Model gml:offsetBase , gml:distance , gml:refDirection{0,1}
Children gml:distance, gml:offsetBase, gml:refDirection
Attributes
QName Type Fixed Default Use Annotation
numDerivativeInterior integer 0 optional
The attribute "numDerivativesInterior" specifies the type of continuity that is guaranteed interior to the curve. The default value of "0" means simple continuity, which is a mandatory minimum level of continuity. This level is referred to as "C 0 " in mathematical texts. A value of 1 means that the function and its first derivative are continuous at the appropriate end point: "C 1 " continuity. A value of "n" for any integer means the function and its first n derivatives are continuous: "C n " continuity. NOTE: Use of these values is only appropriate when the basic curve definition is an underdetermined system. For example, line string segments cannot support continuity above C 0 , since there is no spare control parameter to adjust the incoming angle at the end points of the segment. Spline functions on the other hand often have extra degrees of freedom on end segments that allow them to adjust the values of the derivatives to support C 1 or higher continuity.
numDerivativesAtEnd integer 0 optional
The attribute "numDerivativesAtEnd" specifies the type of continuity between this curve segment and its successor. If this is the last curve segment in the curve, one of these values, as appropriate, is ignored. The default value of "0" means simple continuity, which is a mandatory minimum level of continuity. This level is referred to as "C 0 " in mathematical texts. A value of 1 means that the function and its first derivative are continuous at the appropriate end point: "C 1 " continuity. A value of "n" for any integer means the function and its first n derivatives are continuous: "C n " continuity. NOTE: Use of these values is only appropriate when the basic curve definition is an underdetermined system. For example, line string segments cannot support continuity above C 0 , since there is no spare control parameter to adjust the incoming angle at the end points of the segment. Spline functions on the other hand often have extra degrees of freedom on end segments that allow them to adjust the values of the derivatives to support C 1 or higher continuity.
numDerivativesAtStart integer 0 optional
The attribute "numDerivativesAtStart" specifies the type of continuity between this curve segment and its predecessor. If this is the first curve segment in the curve, one of these values, as appropriate, is ignored. The default value of "0" means simple continuity, which is a mandatory minimum level of continuity. This level is referred to as "C 0 " in mathematical texts. A value of 1 means that the function and its first derivative are continuous at the appropriate end point: "C 1 " continuity. A value of "n" for any integer means the function and its first n derivatives are continuous: "C n " continuity. NOTE: Use of these values is only appropriate when the basic curve definition is an underdetermined system. For example, line string segments cannot support continuity above C 0 , since there is no spare control parameter to adjust the incoming angle at the end points of the segment. Spline functions on the other hand often have extra degrees of freedom on end segments that allow them to adjust the values of the derivatives to support C 1 or higher continuity.
Source
<complexType name="OffsetCurveType">
  <annotation>
    <documentation>An offset curve is a curve at a constant
		 distance from the basis curve. They can be useful as a cheap
		 and simple alternative to constructing curves that are offsets	
		 by definition.</documentation>
  </annotation>
  <complexContent>
    <extension base="gml:AbstractCurveSegmentType">
      <sequence>
        <element name="offsetBase" type="gml:CurvePropertyType">
          <annotation>
            <documentation>offsetBase is a reference to thecurve from which this
							 curve is define	as an offset.</documentation>
          </annotation>
        </element>
        <element name="distance" type="gml:LengthType">
          <annotation>
            <documentation>distance is the distance at which the
							 offset curve is generated from the basis curve. In 2D systems, positive distances
							 are to be to the left of the basis curve, and the negative distances are to be to the 
							 right of the basis curve.</documentation>
          </annotation>
        </element>
        <element name="refDirection" type="gml:VectorType" minOccurs="0">
          <annotation>
            <documentation>refDistance is used to define the vector
       direction of the offset curve from the basis curve. It can
       be omitted in the 2D case, where the distance can be 
       positive or negative. In that case, distance defines left
       side (positive distance) or right side (negative distance)
       with respect to the tangent to the basis curve.

       In 3D the basis curve shall have a well defined tangent 
       direction for every point. The offset curve at any point 
       in 3D, the basis curve shall have a well-defined tangent
       direction for every point. The offset curve at any point
       (parameter) on the basis curve c is in the direction
       -   -   -         -               
       s = v x t  where  v = c.refDirection()  
       and
       -
       t = c.tangent()
                                                    -
       For the offset direction to be well-defined, v shall not
       on any point of the curve be in the same, or opposite, 
       direction as
       - 
       t.

       The default value of the refDirection shall be the local
       co-ordinate axis vector for elevation, which indicates up for
       the curve in a geographic sense.

       NOTE! If the refDirection is the positive tangent to the
       local elevation axis ("points upward"), then the offset
       vector points to the left of the curve when viewed from
       above.</documentation>
          </annotation>
        </element>
      </sequence>
    </extension>
  </complexContent>
</complexType>
Complex Type gml:AffinePlacementType
Namespace http://www.opengis.net/gml
Annotations
A placement takes a standard geometric construction and places it in geographic space. It defines a transformation from a constructive parameter space to the co-ordinate space of the co-ordinate reference system being used. Parameter spaces in formulae in this International Standard are given as (u, v) in 2D and(u, v, w) in 3D. Co-ordinate reference systems positions are given in formulae, in this International Standard, by either (x, y) in 2D, or (x, y, z) in 3D. Affine placements are defined by linear transformations from parameter space to the target co-ordiante space. 2-dimensional Cartesian parameter space,(u,v) transforms into 3-dimensional co- ordinate reference systems,(x,y,z) by using an affine transformation,(u,v)->(x,y,z) which is defined : x ux vx x0 u y = uy vy + y0 v x uz vz z0 Then, given this equation, the location element of the AffinePlacement is the direct position (x0, y0, z0), which is the target position of the origin in (u, v). The two reference directions (ux, uy, uz) and (vx, vy, vz) are the target directions of the unit vectors at the origin in (u, v).
Diagram
Diagram index5.tmp#id1689 index5.tmp#id1690 index5.tmp#id1691 index5.tmp#id1692
Used by
Model gml:location , gml:refDirection+ , gml:inDimension , gml:outDimension
Children gml:inDimension, gml:location, gml:outDimension, gml:refDirection
Source
<complexType name="AffinePlacementType">
  <annotation>
    <documentation>A placement takes a standard geometric
   construction and places it in geographic space. It defines a
   transformation from a constructive parameter space to the 
   co-ordinate space of the co-ordinate reference system being used.  
   Parameter spaces in formulae in this International Standard are 
   given as (u, v) in 2D and(u, v, w) in 3D. Co-ordinate reference 
   systems positions are given in formulae, in this International 
   Standard, by either (x, y) in 2D, or (x, y, z) in 3D.

   Affine placements are defined by linear transformations from 
   parameter space to the target co-ordiante space. 2-dimensional 
   Cartesian parameter space,(u,v) transforms into 3-dimensional co-
   ordinate reference systems,(x,y,z) by using an affine 
   transformation,(u,v)->(x,y,z) which is defined :

	x	ux vx  	x0
			 u	  
	y =	uy vy   + y0
			 v		
	x	uz vz	z0
	
   Then, given this equation, the location element of the 
   AffinePlacement is the direct position (x0, y0, z0), which is the
   target position of the origin in (u, v). The two reference
   directions (ux, uy, uz) and (vx, vy, vz) are the target     
   directions of the unit vectors at the origin in (u, v).</documentation>
  </annotation>
  <sequence>
    <element name="location" type="gml:DirectPositionType">
      <annotation>
        <documentation>The location property gives 
     the target of the parameter space origin. This is the vector  
    (x0, y0, z0) in the formulae above.</documentation>
      </annotation>
    </element>
    <element name="refDirection" type="gml:VectorType" maxOccurs="unbounded">
      <annotation>
        <documentation>The attribute refDirection gives the    
target directions for the co-ordinate basis vectors of the  
parameter space. These are the columns of the matrix in the 
formulae given above. The number of directions given shall be 
inDimension. The dimension of the directions shall be 
outDimension.</documentation>
      </annotation>
    </element>
    <element name="inDimension" type="positiveInteger">
      <annotation>
        <documentation>Dimension of the constructive parameter 
     space.</documentation>
      </annotation>
    </element>
    <element name="outDimension" type="positiveInteger">
      <annotation>
        <documentation>Dimension of the co-ordinate space.</documentation>
      </annotation>
    </element>
  </sequence>
</complexType>
Complex Type gml:ClothoidType
Namespace http://www.opengis.net/gml
Annotations
A clothoid, or Cornu's spiral, is plane curve whose curvature is a fixed function of its length. In suitably chosen co-ordinates it is given by Fresnel's integrals. x(t) = 0-integral-t cos(AT*T/2)dT y(t) = 0-integral-t sin(AT*T/2)dT This geometry is mainly used as a transition curve between curves of type straight line to circular arc or circular arc to circular arc. With this curve type it is possible to achieve a C2-continous transition between the above mentioned curve types. One formula for the Clothoid is A*A = R*t where A is constant, R is the varying radius of curvature along the the curve and t is the length along and given in the Fresnel integrals.
Diagram
Diagram index5.tmp#id1652 index5.tmp#id1653 index5.tmp#id1654 index5.tmp#id1651 index5.tmp#id1694 index5.tmp#id1695 index5.tmp#id1696 index5.tmp#id1697
Type extension of gml:AbstractCurveSegmentType
Type hierarchy
Used by
Element gml:Clothoid
Model gml:refLocation , gml:scaleFactor , gml:startParameter , gml:endParameter
Children gml:endParameter, gml:refLocation, gml:scaleFactor, gml:startParameter
Attributes
QName Type Fixed Default Use Annotation
numDerivativeInterior integer 0 optional
The attribute "numDerivativesInterior" specifies the type of continuity that is guaranteed interior to the curve. The default value of "0" means simple continuity, which is a mandatory minimum level of continuity. This level is referred to as "C 0 " in mathematical texts. A value of 1 means that the function and its first derivative are continuous at the appropriate end point: "C 1 " continuity. A value of "n" for any integer means the function and its first n derivatives are continuous: "C n " continuity. NOTE: Use of these values is only appropriate when the basic curve definition is an underdetermined system. For example, line string segments cannot support continuity above C 0 , since there is no spare control parameter to adjust the incoming angle at the end points of the segment. Spline functions on the other hand often have extra degrees of freedom on end segments that allow them to adjust the values of the derivatives to support C 1 or higher continuity.
numDerivativesAtEnd integer 0 optional
The attribute "numDerivativesAtEnd" specifies the type of continuity between this curve segment and its successor. If this is the last curve segment in the curve, one of these values, as appropriate, is ignored. The default value of "0" means simple continuity, which is a mandatory minimum level of continuity. This level is referred to as "C 0 " in mathematical texts. A value of 1 means that the function and its first derivative are continuous at the appropriate end point: "C 1 " continuity. A value of "n" for any integer means the function and its first n derivatives are continuous: "C n " continuity. NOTE: Use of these values is only appropriate when the basic curve definition is an underdetermined system. For example, line string segments cannot support continuity above C 0 , since there is no spare control parameter to adjust the incoming angle at the end points of the segment. Spline functions on the other hand often have extra degrees of freedom on end segments that allow them to adjust the values of the derivatives to support C 1 or higher continuity.
numDerivativesAtStart integer 0 optional
The attribute "numDerivativesAtStart" specifies the type of continuity between this curve segment and its predecessor. If this is the first curve segment in the curve, one of these values, as appropriate, is ignored. The default value of "0" means simple continuity, which is a mandatory minimum level of continuity. This level is referred to as "C 0 " in mathematical texts. A value of 1 means that the function and its first derivative are continuous at the appropriate end point: "C 1 " continuity. A value of "n" for any integer means the function and its first n derivatives are continuous: "C n " continuity. NOTE: Use of these values is only appropriate when the basic curve definition is an underdetermined system. For example, line string segments cannot support continuity above C 0 , since there is no spare control parameter to adjust the incoming angle at the end points of the segment. Spline functions on the other hand often have extra degrees of freedom on end segments that allow them to adjust the values of the derivatives to support C 1 or higher continuity.
Source
<complexType name="ClothoidType">
  <annotation>
    <documentation>A clothoid, or Cornu's spiral, is plane
   curve whose curvature is a fixed function of its length.
   In suitably chosen co-ordinates it is given by Fresnel's
   integrals.

    x(t) = 0-integral-t cos(AT*T/2)dT    
    
    y(t) = 0-integral-t sin(AT*T/2)dT
   
   This geometry is mainly used as a transition curve between
   curves of type straight line to circular arc or circular arc
   to circular arc. With this curve type it is possible to 
   achieve a C2-continous transition between the above mentioned
   curve types. One formula for the Clothoid is A*A = R*t where
   A is constant, R is the varying radius of curvature along the
   the curve and t is the length along and given in the Fresnel 
   integrals.</documentation>
  </annotation>
  <complexContent>
    <extension base="gml:AbstractCurveSegmentType">
      <sequence>
        <element name="refLocation">
          <complexType>
            <sequence>
              <element ref="gml:AffinePlacement">
                <annotation>
                  <documentation>The "refLocation" is an affine mapping 
          that places  the curve defined by the Fresnel Integrals  
          into the co-ordinate reference system of this object.</documentation>
                </annotation>
              </element>
            </sequence>
          </complexType>
        </element>
        <element name="scaleFactor" type="decimal">
          <annotation>
            <documentation>The element gives the value for the
       constant in the Fresnel's integrals.</documentation>
          </annotation>
        </element>
        <element name="startParameter" type="double">
          <annotation>
            <documentation>The startParameter is the arc length
       distance from the inflection point that will be the start
       point for this curve segment. This shall be lower limit
       used in the Fresnel integral and is the value of the
       constructive parameter of this curve segment at its start
       point. The startParameter can either be positive or
       negative. 
       NOTE! If 0.0 (zero), lies between the startParameter and
       the endParameter of the clothoid, then the curve goes
       through the clothoid's inflection point, and the direction
       of its radius of curvature, given by the second
       derivative vector, changes sides with respect to the
       tangent vector. The term length distance for the</documentation>
          </annotation>
        </element>
        <element name="endParameter" type="double">
          <annotation>
            <documentation>The endParameter is the arc length
       distance from the inflection point that will be the end
       point for this curve segment. This shall be upper limit
       used in the Fresnel integral and is the value of the
       constructive parameter of this curve segment at its
       start point. The startParameter can either be positive
       or negative.</documentation>
          </annotation>
        </element>
      </sequence>
    </extension>
  </complexContent>
</complexType>
Complex Type gml:GeodesicStringType
Namespace http://www.opengis.net/gml
Annotations
A GeodesicString consists of sequence of geodesic segments. The type essentially combines a sequence of Geodesic into a single object. The GeodesicString is computed from two or more positions and an interpolation using geodesics defined from the geoid (or ellipsoid) of the co-ordinate reference system being used.
Diagram
Diagram index5.tmp#id1652 index5.tmp#id1653 index5.tmp#id1654 index5.tmp#id1651 index5.tmp#id1699 index6.tmp#id792 index6.tmp#id772 index6.tmp#id720 index6.tmp#id1325
Type extension of gml:AbstractCurveSegmentType
Type hierarchy
Used by
Element gml:GeodesicString
Complex Type gml:GeodesicType
Model gml:posList | gml:pos | gml:pointProperty
Children gml:pointProperty, gml:pos, gml:posList
Attributes
QName Type Fixed Default Use Annotation
interpolation gml:CurveInterpolationType geodesic optional
The attribute "interpolation" specifies the curve interpolation mechanism used for this segment. This mechanism uses the control points and control parameters to determine the position of this curve segment. For an GeodesicString the interpolation is fixed as "geodesic".
numDerivativeInterior integer 0 optional
The attribute "numDerivativesInterior" specifies the type of continuity that is guaranteed interior to the curve. The default value of "0" means simple continuity, which is a mandatory minimum level of continuity. This level is referred to as "C 0 " in mathematical texts. A value of 1 means that the function and its first derivative are continuous at the appropriate end point: "C 1 " continuity. A value of "n" for any integer means the function and its first n derivatives are continuous: "C n " continuity. NOTE: Use of these values is only appropriate when the basic curve definition is an underdetermined system. For example, line string segments cannot support continuity above C 0 , since there is no spare control parameter to adjust the incoming angle at the end points of the segment. Spline functions on the other hand often have extra degrees of freedom on end segments that allow them to adjust the values of the derivatives to support C 1 or higher continuity.
numDerivativesAtEnd integer 0 optional
The attribute "numDerivativesAtEnd" specifies the type of continuity between this curve segment and its successor. If this is the last curve segment in the curve, one of these values, as appropriate, is ignored. The default value of "0" means simple continuity, which is a mandatory minimum level of continuity. This level is referred to as "C 0 " in mathematical texts. A value of 1 means that the function and its first derivative are continuous at the appropriate end point: "C 1 " continuity. A value of "n" for any integer means the function and its first n derivatives are continuous: "C n " continuity. NOTE: Use of these values is only appropriate when the basic curve definition is an underdetermined system. For example, line string segments cannot support continuity above C 0 , since there is no spare control parameter to adjust the incoming angle at the end points of the segment. Spline functions on the other hand often have extra degrees of freedom on end segments that allow them to adjust the values of the derivatives to support C 1 or higher continuity.
numDerivativesAtStart integer 0 optional
The attribute "numDerivativesAtStart" specifies the type of continuity between this curve segment and its predecessor. If this is the first curve segment in the curve, one of these values, as appropriate, is ignored. The default value of "0" means simple continuity, which is a mandatory minimum level of continuity. This level is referred to as "C 0 " in mathematical texts. A value of 1 means that the function and its first derivative are continuous at the appropriate end point: "C 1 " continuity. A value of "n" for any integer means the function and its first n derivatives are continuous: "C n " continuity. NOTE: Use of these values is only appropriate when the basic curve definition is an underdetermined system. For example, line string segments cannot support continuity above C 0 , since there is no spare control parameter to adjust the incoming angle at the end points of the segment. Spline functions on the other hand often have extra degrees of freedom on end segments that allow them to adjust the values of the derivatives to support C 1 or higher continuity.
Source
<complexType name="GeodesicStringType">
  <annotation>
    <documentation>A GeodesicString consists of sequence of
   geodesic segments. The type essentially combines a sequence of
   Geodesic into a single object.
   The GeodesicString is computed from two or more positions and an
   interpolation using geodesics defined from the geoid (or 
   ellipsoid) of the co-ordinate reference system being used.</documentation>
  </annotation>
  <complexContent>
    <extension base="gml:AbstractCurveSegmentType">
      <choice>
        <element ref="gml:posList"/>
        <group ref="gml:geometricPositionGroup" minOccurs="2" maxOccurs="unbounded"/>
      </choice>
      <attribute name="interpolation" type="gml:CurveInterpolationType" fixed="geodesic">
        <annotation>
          <documentation>The attribute "interpolation" specifies the
     curve interpolation mechanism used for this segment. This
     mechanism uses the control points and control parameters to
     determine the position of this curve segment. For an 
     GeodesicString the interpolation is fixed as "geodesic".</documentation>
        </annotation>
      </attribute>
    </extension>
  </complexContent>
</complexType>
Complex Type gml:GeodesicType
Namespace http://www.opengis.net/gml
Annotations
A Geodesic consists of two distinct positions joined by a geodesic curve. The control points of a Geodesic shall lie on the geodesic between its start point and end points. Between these two points, a geodesic curve defined from ellipsoid or geoid model used by the co-ordinate reference systems may be used to interpolate other positions. Any other point in the controlPoint array must fall on this geodesic.
Diagram
Diagram index5.tmp#id1652 index5.tmp#id1653 index5.tmp#id1654 index5.tmp#id1651 index5.tmp#id1699 index6.tmp#id792 index6.tmp#id772 index6.tmp#id720 index6.tmp#id1325 index5.tmp#id1698
Type extension of gml:GeodesicStringType
Type hierarchy
Used by
Element gml:Geodesic
Model gml:posList | gml:pos | gml:pointProperty
Children gml:pointProperty, gml:pos, gml:posList
Attributes
QName Type Fixed Default Use Annotation
interpolation gml:CurveInterpolationType geodesic optional
The attribute "interpolation" specifies the curve interpolation mechanism used for this segment. This mechanism uses the control points and control parameters to determine the position of this curve segment. For an GeodesicString the interpolation is fixed as "geodesic".
numDerivativeInterior integer 0 optional
The attribute "numDerivativesInterior" specifies the type of continuity that is guaranteed interior to the curve. The default value of "0" means simple continuity, which is a mandatory minimum level of continuity. This level is referred to as "C 0 " in mathematical texts. A value of 1 means that the function and its first derivative are continuous at the appropriate end point: "C 1 " continuity. A value of "n" for any integer means the function and its first n derivatives are continuous: "C n " continuity. NOTE: Use of these values is only appropriate when the basic curve definition is an underdetermined system. For example, line string segments cannot support continuity above C 0 , since there is no spare control parameter to adjust the incoming angle at the end points of the segment. Spline functions on the other hand often have extra degrees of freedom on end segments that allow them to adjust the values of the derivatives to support C 1 or higher continuity.
numDerivativesAtEnd integer 0 optional
The attribute "numDerivativesAtEnd" specifies the type of continuity between this curve segment and its successor. If this is the last curve segment in the curve, one of these values, as appropriate, is ignored. The default value of "0" means simple continuity, which is a mandatory minimum level of continuity. This level is referred to as "C 0 " in mathematical texts. A value of 1 means that the function and its first derivative are continuous at the appropriate end point: "C 1 " continuity. A value of "n" for any integer means the function and its first n derivatives are continuous: "C n " continuity. NOTE: Use of these values is only appropriate when the basic curve definition is an underdetermined system. For example, line string segments cannot support continuity above C 0 , since there is no spare control parameter to adjust the incoming angle at the end points of the segment. Spline functions on the other hand often have extra degrees of freedom on end segments that allow them to adjust the values of the derivatives to support C 1 or higher continuity.
numDerivativesAtStart integer 0 optional
The attribute "numDerivativesAtStart" specifies the type of continuity between this curve segment and its predecessor. If this is the first curve segment in the curve, one of these values, as appropriate, is ignored. The default value of "0" means simple continuity, which is a mandatory minimum level of continuity. This level is referred to as "C 0 " in mathematical texts. A value of 1 means that the function and its first derivative are continuous at the appropriate end point: "C 1 " continuity. A value of "n" for any integer means the function and its first n derivatives are continuous: "C n " continuity. NOTE: Use of these values is only appropriate when the basic curve definition is an underdetermined system. For example, line string segments cannot support continuity above C 0 , since there is no spare control parameter to adjust the incoming angle at the end points of the segment. Spline functions on the other hand often have extra degrees of freedom on end segments that allow them to adjust the values of the derivatives to support C 1 or higher continuity.
Source
<complexType name="GeodesicType">
  <annotation>
    <documentation>A Geodesic consists of two distinct
   positions joined by a geodesic curve. The control points of
   a Geodesic shall lie on the geodesic between its start
   point and end points. Between these two points, a geodesic
   curve defined from ellipsoid or geoid model used by the
   co-ordinate reference systems may be used to interpolate
   other positions. Any other point in the controlPoint array
   must fall on this geodesic.</documentation>
  </annotation>
  <complexContent>
    <extension base="gml:GeodesicStringType"/>
  </complexContent>
</complexType>
Complex Type gml:CubicSplineType
Namespace http://www.opengis.net/gml
Annotations
Cubic splines are similar to line strings in that they are a sequence of segments each with its own defining function. A cubic spline uses the control points and a set of derivative parameters to define a piecewise 3rd degree polynomial interpolation. Unlike line-strings, the parameterization by arc length is not necessarily still a polynomial. The function describing the curve must be C2, that is, have a continuous 1st and 2nd derivative at all points, and pass through the controlPoints in the order given. Between the control points, the curve segment is defined by a cubic polynomial. At each control point, the polynomial changes in such a manner that the 1st and 2nd derivative vectors are the same from either side. The control parameters record must contain vectorAtStart, and vectorAtEnd which are the unit tangent vectors at controlPoint[1] and controlPoint[n] where n = controlPoint.count. Note: only the direction of the vectors is relevant, not their length.
Diagram
Diagram index5.tmp#id1652 index5.tmp#id1653 index5.tmp#id1654 index5.tmp#id1651 index5.tmp#id1704 index5.tmp#id1705 index6.tmp#id772 index6.tmp#id720 index6.tmp#id791 index6.tmp#id792 index6.tmp#id775 index5.tmp#id1702 index5.tmp#id1703
Type extension of gml:AbstractCurveSegmentType
Type hierarchy
Used by
Element gml:CubicSpline
Model (gml:pos | gml:pointProperty | gml:pointRep | gml:posList | gml:coordinates) , gml:vectorAtStart , gml:vectorAtEnd
Children gml:coordinates, gml:pointProperty, gml:pointRep, gml:pos, gml:posList, gml:vectorAtEnd, gml:vectorAtStart
Attributes
QName Type Fixed Default Use Annotation
degree integer 3 optional
The degree for a cubic spline is "3".
interpolation gml:CurveInterpolationType cubicSpline optional
The attribute "interpolation" specifies the curve interpolation mechanism used for this segment. This mechanism uses the control points and control parameters to determine the position of this curve segment. For a CubicSpline the interpolation is fixed as "cubicSpline".
numDerivativeInterior integer 0 optional
The attribute "numDerivativesInterior" specifies the type of continuity that is guaranteed interior to the curve. The default value of "0" means simple continuity, which is a mandatory minimum level of continuity. This level is referred to as "C 0 " in mathematical texts. A value of 1 means that the function and its first derivative are continuous at the appropriate end point: "C 1 " continuity. A value of "n" for any integer means the function and its first n derivatives are continuous: "C n " continuity. NOTE: Use of these values is only appropriate when the basic curve definition is an underdetermined system. For example, line string segments cannot support continuity above C 0 , since there is no spare control parameter to adjust the incoming angle at the end points of the segment. Spline functions on the other hand often have extra degrees of freedom on end segments that allow them to adjust the values of the derivatives to support C 1 or higher continuity.
numDerivativesAtEnd integer 0 optional
The attribute "numDerivativesAtEnd" specifies the type of continuity between this curve segment and its successor. If this is the last curve segment in the curve, one of these values, as appropriate, is ignored. The default value of "0" means simple continuity, which is a mandatory minimum level of continuity. This level is referred to as "C 0 " in mathematical texts. A value of 1 means that the function and its first derivative are continuous at the appropriate end point: "C 1 " continuity. A value of "n" for any integer means the function and its first n derivatives are continuous: "C n " continuity. NOTE: Use of these values is only appropriate when the basic curve definition is an underdetermined system. For example, line string segments cannot support continuity above C 0 , since there is no spare control parameter to adjust the incoming angle at the end points of the segment. Spline functions on the other hand often have extra degrees of freedom on end segments that allow them to adjust the values of the derivatives to support C 1 or higher continuity.
numDerivativesAtStart integer 0 optional
The attribute "numDerivativesAtStart" specifies the type of continuity between this curve segment and its predecessor. If this is the first curve segment in the curve, one of these values, as appropriate, is ignored. The default value of "0" means simple continuity, which is a mandatory minimum level of continuity. This level is referred to as "C 0 " in mathematical texts. A value of 1 means that the function and its first derivative are continuous at the appropriate end point: "C 1 " continuity. A value of "n" for any integer means the function and its first n derivatives are continuous: "C n " continuity. NOTE: Use of these values is only appropriate when the basic curve definition is an underdetermined system. For example, line string segments cannot support continuity above C 0 , since there is no spare control parameter to adjust the incoming angle at the end points of the segment. Spline functions on the other hand often have extra degrees of freedom on end segments that allow them to adjust the values of the derivatives to support C 1 or higher continuity.
Source
<complexType name="CubicSplineType">
  <annotation>
    <documentation>Cubic splines are similar to line strings in that they are a sequence of segments each with its own defining function. A cubic spline uses the control points and a set of derivative parameters to define a piecewise 3rd degree polynomial interpolation. Unlike line-strings, the parameterization by arc length is not necessarily still a polynomial. 
				The function describing the curve must be C2, that is, have a continuous 1st and 2nd derivative at all points, and pass through the controlPoints in the order given. Between the control points, the curve segment is defined by a cubic polynomial. At each control point, the polynomial changes in such a manner that the 1st and 2nd derivative vectors are the same from either side. The control parameters record must contain vectorAtStart, and vectorAtEnd which are the unit tangent vectors at controlPoint[1] and controlPoint[n] where n = controlPoint.count. 
				Note: only the direction of the vectors is relevant, not their length.</documentation>
  </annotation>
  <complexContent>
    <extension base="gml:AbstractCurveSegmentType">
      <sequence>
        <choice>
          <annotation>
            <documentation>GML supports two different ways to specify the control points of a curve segment.
1. A sequence of "pos" (DirectPositionType) or "pointProperty" (PointPropertyType) elements. "pos" elements are control points that are only part of this curve segment, "pointProperty" elements contain a point that may be referenced from other geometry elements or reference another point defined outside of this curve segment (reuse of existing points).
2. The "posList" element allows for a compact way to specifiy the coordinates of the control points, if all control points are in the same coordinate reference systems and belong to this curve segment only. The number of direct positions in the list must be at least three.</documentation>
          </annotation>
          <choice minOccurs="2" maxOccurs="unbounded">
            <element ref="gml:pos"/>
            <element ref="gml:pointProperty"/>
            <element ref="gml:pointRep">
              <annotation>
                <documentation>Deprecated with GML version 3.1.0. Use "pointProperty" instead. Included for backwards compatibility with GML 3.0.0.</documentation>
              </annotation>
            </element>
          </choice>
          <element ref="gml:posList"/>
          <element ref="gml:coordinates">
            <annotation>
              <documentation>Deprecated with GML version 3.1.0. Use "posList" instead.</documentation>
            </annotation>
          </element>
        </choice>
        <element name="vectorAtStart" type="gml:VectorType">
          <annotation>
            <documentation>"vectorAtStart" is the unit tangent vector at the start point of the spline.</documentation>
          </annotation>
        </element>
        <element name="vectorAtEnd" type="gml:VectorType">
          <annotation>
            <documentation>"vectorAtEnd" is the unit tangent vector at the end point of the spline.</documentation>
          </annotation>
        </element>
      </sequence>
      <attribute name="interpolation" type="gml:CurveInterpolationType" fixed="cubicSpline">
        <annotation>
          <documentation>The attribute "interpolation" specifies the curve interpolation mechanism used for this segment. This mechanism
uses the control points and control parameters to determine the position of this curve segment. For a CubicSpline the interpolation is fixed as "cubicSpline".</documentation>
        </annotation>
      </attribute>
      <attribute name="degree" type="integer" fixed="3">
        <annotation>
          <documentation>The degree for a cubic spline is "3".</documentation>
        </annotation>
      </attribute>
    </extension>
  </complexContent>
</complexType>
Complex Type gml:KnotType
Namespace http://www.opengis.net/gml
Annotations
A knot is a breakpoint on a piecewise spline curve.
Diagram
Diagram index5.tmp#id1707 index5.tmp#id1708 index5.tmp#id1709
Used by
Model gml:value , gml:multiplicity , gml:weight
Children gml:multiplicity, gml:value, gml:weight
Source
<complexType name="KnotType">
  <annotation>
    <documentation>A knot is a breakpoint on a piecewise spline curve.</documentation>
  </annotation>
  <sequence>
    <element name="value" type="double">
      <annotation>
        <documentation>The property "value" is the value of the parameter at the knot of the spline. The sequence of knots shall be a non-decreasing sequence. That is, each knot's value in the sequence shall be equal to or greater than the previous knot's value. The use of equal consecutive knots is normally handled using the multiplicity.</documentation>
      </annotation>
    </element>
    <element name="multiplicity" type="nonNegativeInteger">
      <annotation>
        <documentation>The property "multiplicity" is the multiplicity of this knot used in the definition of the spline (with the same weight).</documentation>
      </annotation>
    </element>
    <element name="weight" type="double">
      <annotation>
        <documentation>The property "weight" is the value of the averaging weight used for this knot of the spline.</documentation>
      </annotation>
    </element>
  </sequence>
</complexType>
Complex Type gml:KnotPropertyType
Namespace http://www.opengis.net/gml
Annotations
Encapsulates a knot to use it in a geometric type.
Diagram
Diagram index5.tmp#id1711
Used by
Model gml:Knot
Children gml:Knot
Source
<complexType name="KnotPropertyType">
  <annotation>
    <documentation>Encapsulates a knot to use it in a geometric type.</documentation>
  </annotation>
  <sequence>
    <element name="Knot" type="gml:KnotType"/>
  </sequence>
</complexType>
Complex Type gml:BSplineType
Namespace http://www.opengis.net/gml
Annotations
A B-Spline is a piecewise parametric polynomial or rational curve described in terms of control points and basis functions. Knots are breakpoints on the curve that connect its pieces. They are given as a non-decreasing sequence of real numbers. If the weights in the knots are equal then it is a polynomial spline. The degree is the algebraic degree of the basis functions.
Diagram
Diagram index5.tmp#id1652 index5.tmp#id1653 index5.tmp#id1654 index5.tmp#id1651 index5.tmp#id1715 index5.tmp#id1716 index5.tmp#id1717 index6.tmp#id772 index6.tmp#id720 index6.tmp#id791 index6.tmp#id792 index6.tmp#id775 index5.tmp#id1713 index5.tmp#id1714
Type extension of gml:AbstractCurveSegmentType
Type hierarchy
Used by
Element gml:BSpline
Complex Type gml:BezierType
Model (gml:pos | gml:pointProperty | gml:pointRep | gml:posList | gml:coordinates) , gml:degree , gml:knot{2,unbounded}
Children gml:coordinates, gml:degree, gml:knot, gml:pointProperty, gml:pointRep, gml:pos, gml:posList
Attributes
QName Type Fixed Default Use Annotation
interpolation gml:CurveInterpolationType polynomialSpline optional
The attribute "interpolation" specifies the curve interpolation mechanism used for this segment. This mechanism uses the control points and control parameters to determine the position of this curve segment. For a BSpline the interpolation can be either "polynomialSpline" or "rationalSpline", default is "polynomialSpline".
isPolynomial boolean optional
The attribute isPolynomial is set to true if this is a polynomial spline.
knotType gml:KnotTypesType optional
The attribute "knotType" gives the type of knot distribution used in defining this spline. This is for information only and is set according to the different construction-functions.
numDerivativeInterior integer 0 optional
The attribute "numDerivativesInterior" specifies the type of continuity that is guaranteed interior to the curve. The default value of "0" means simple continuity, which is a mandatory minimum level of continuity. This level is referred to as "C 0 " in mathematical texts. A value of 1 means that the function and its first derivative are continuous at the appropriate end point: "C 1 " continuity. A value of "n" for any integer means the function and its first n derivatives are continuous: "C n " continuity. NOTE: Use of these values is only appropriate when the basic curve definition is an underdetermined system. For example, line string segments cannot support continuity above C 0 , since there is no spare control parameter to adjust the incoming angle at the end points of the segment. Spline functions on the other hand often have extra degrees of freedom on end segments that allow them to adjust the values of the derivatives to support C 1 or higher continuity.
numDerivativesAtEnd integer 0 optional
The attribute "numDerivativesAtEnd" specifies the type of continuity between this curve segment and its successor. If this is the last curve segment in the curve, one of these values, as appropriate, is ignored. The default value of "0" means simple continuity, which is a mandatory minimum level of continuity. This level is referred to as "C 0 " in mathematical texts. A value of 1 means that the function and its first derivative are continuous at the appropriate end point: "C 1 " continuity. A value of "n" for any integer means the function and its first n derivatives are continuous: "C n " continuity. NOTE: Use of these values is only appropriate when the basic curve definition is an underdetermined system. For example, line string segments cannot support continuity above C 0 , since there is no spare control parameter to adjust the incoming angle at the end points of the segment. Spline functions on the other hand often have extra degrees of freedom on end segments that allow them to adjust the values of the derivatives to support C 1 or higher continuity.
numDerivativesAtStart integer 0 optional
The attribute "numDerivativesAtStart" specifies the type of continuity between this curve segment and its predecessor. If this is the first curve segment in the curve, one of these values, as appropriate, is ignored. The default value of "0" means simple continuity, which is a mandatory minimum level of continuity. This level is referred to as "C 0 " in mathematical texts. A value of 1 means that the function and its first derivative are continuous at the appropriate end point: "C 1 " continuity. A value of "n" for any integer means the function and its first n derivatives are continuous: "C n " continuity. NOTE: Use of these values is only appropriate when the basic curve definition is an underdetermined system. For example, line string segments cannot support continuity above C 0 , since there is no spare control parameter to adjust the incoming angle at the end points of the segment. Spline functions on the other hand often have extra degrees of freedom on end segments that allow them to adjust the values of the derivatives to support C 1 or higher continuity.
Source
<complexType name="BSplineType">
  <annotation>
    <documentation>A B-Spline is a piecewise parametric polynomial or rational curve described in terms of control points and basis functions. Knots are breakpoints on the curve that connect its pieces. They are given as a non-decreasing sequence of real numbers. If the weights in the knots are equal then it is a polynomial spline. The degree is the algebraic degree of the basis functions.</documentation>
  </annotation>
  <complexContent>
    <extension base="gml:AbstractCurveSegmentType">
      <sequence>
        <choice>
          <annotation>
            <documentation>GML supports two different ways to specify the control points of a curve segment.
1. A sequence of "pos" (DirectPositionType) or "pointProperty" (PointPropertyType) elements. "pos" elements are control points that are only part of this curve segment, "pointProperty" elements contain a point that may be referenced from other geometry elements or reference another point defined outside of this curve segment (reuse of existing points).
2. The "posList" element allows for a compact way to specifiy the coordinates of the control points, if all control points are in the same coordinate reference systems and belong to this curve segment only.</documentation>
          </annotation>
          <choice minOccurs="0" maxOccurs="unbounded">
            <element ref="gml:pos"/>
            <element ref="gml:pointProperty"/>
            <element ref="gml:pointRep">
              <annotation>
                <documentation>Deprecated with GML version 3.1.0. Use "pointProperty" instead. Included for backwards compatibility with GML 3.0.0.</documentation>
              </annotation>
            </element>
          </choice>
          <element ref="gml:posList"/>
          <element ref="gml:coordinates">
            <annotation>
              <documentation>Deprecated with GML version 3.1.0. Use "posList" instead.</documentation>
            </annotation>
          </element>
        </choice>
        <element name="degree" type="nonNegativeInteger">
          <annotation>
            <documentation>The attribute "degree" shall be the degree of the polynomial used for interpolation in this spline.</documentation>
          </annotation>
        </element>
        <element name="knot" type="gml:KnotPropertyType" minOccurs="2" maxOccurs="unbounded">
          <annotation>
            <documentation>The property "knot" shall be the sequence of distinct knots used to define the spline basis functions.</documentation>
          </annotation>
        </element>
      </sequence>
      <attribute name="interpolation" type="gml:CurveInterpolationType" default="polynomialSpline">
        <annotation>
          <documentation>The attribute "interpolation" specifies the curve interpolation mechanism used for this segment. This mechanism
uses the control points and control parameters to determine the position of this curve segment. For a BSpline the interpolation can be either "polynomialSpline" or "rationalSpline", default is "polynomialSpline".</documentation>
        </annotation>
      </attribute>
      <attribute name="isPolynomial" type="boolean" use="optional">
        <annotation>
          <documentation>The attribute isPolynomial is set to true if this is a polynomial spline.</documentation>
        </annotation>
      </attribute>
      <attribute name="knotType" type="gml:KnotTypesType" use="optional">
        <annotation>
          <documentation>The attribute "knotType" gives the type of knot distribution used in defining this spline. This is for information only
and is set according to the different construction-functions.</documentation>
        </annotation>
      </attribute>
    </extension>
  </complexContent>
</complexType>
Simple Type gml:KnotTypesType
Namespace http://www.opengis.net/gml
Annotations
Defines allowed values for the knots` type. Uniform knots implies that all knots are of multiplicity 1 and they differ by a positive constant from the preceding knot. Knots are quasi-uniform iff they are of multiplicity (degree + 1) at the ends, of multiplicity 1 elsewhere, and they differ by a positive constant from the preceding knot.
Diagram
Diagram
Type restriction of string
Facets
enumeration uniform
enumeration quasiUniform
enumeration piecewiseBezier
Used by
Source
<simpleType name="KnotTypesType">
  <annotation>
    <documentation>Defines allowed values for the knots` type. Uniform knots implies that all knots are of multiplicity 1 and they differ by a positive constant from the preceding knot. Knots are quasi-uniform iff they are of multiplicity (degree + 1) at the ends, of multiplicity 1 elsewhere, and they differ by a positive constant from the preceding knot.</documentation>
  </annotation>
  <restriction base="string">
    <enumeration value="uniform"/>
    <enumeration value="quasiUniform"/>
    <enumeration value="piecewiseBezier"/>
  </restriction>
</simpleType>
Complex Type gml:BezierType
Namespace http://www.opengis.net/gml
Annotations
Bezier curves are polynomial splines that use Bezier or Bernstein polynomials for interpolation purposes. It is a special case of the B-Spline curve with two knots.
Diagram
Diagram index5.tmp#id1652 index5.tmp#id1653 index5.tmp#id1654 index5.tmp#id1651 index5.tmp#id1715 index5.tmp#id1716 index5.tmp#id1717 index6.tmp#id772 index6.tmp#id720 index6.tmp#id791 index6.tmp#id792 index6.tmp#id775 index5.tmp#id1713 index5.tmp#id1714 index5.tmp#id1712 index5.tmp#id1722 index5.tmp#id1723 index5.tmp#id1724 index6.tmp#id772 index6.tmp#id720 index6.tmp#id791 index6.tmp#id792 index6.tmp#id775 index5.tmp#id1720 index5.tmp#id1721
Type restriction of gml:BSplineType
Type hierarchy
Used by
Element gml:Bezier
Model (gml:pos | gml:pointProperty | gml:pointRep | gml:posList | gml:coordinates) , gml:degree , gml:knot{2,2}
Children gml:coordinates, gml:degree, gml:knot, gml:pointProperty, gml:pointRep, gml:pos, gml:posList
Attributes
QName Type Fixed Default Use Annotation
interpolation gml:CurveInterpolationType polynomialSpline optional
The attribute "interpolation" specifies the curve interpolation mechanism used for this segment. This mechanism uses the control points and control parameters to determine the position of this curve segment. For a Bezier the interpolation is fixed as "polynomialSpline".
isPolynomial boolean true optional
The attribute isPolynomial is set to true as this is a polynomial spline.
numDerivativeInterior integer 0 optional
The attribute "numDerivativesInterior" specifies the type of continuity that is guaranteed interior to the curve. The default value of "0" means simple continuity, which is a mandatory minimum level of continuity. This level is referred to as "C 0 " in mathematical texts. A value of 1 means that the function and its first derivative are continuous at the appropriate end point: "C 1 " continuity. A value of "n" for any integer means the function and its first n derivatives are continuous: "C n " continuity. NOTE: Use of these values is only appropriate when the basic curve definition is an underdetermined system. For example, line string segments cannot support continuity above C 0 , since there is no spare control parameter to adjust the incoming angle at the end points of the segment. Spline functions on the other hand often have extra degrees of freedom on end segments that allow them to adjust the values of the derivatives to support C 1 or higher continuity.
numDerivativesAtEnd integer 0 optional
The attribute "numDerivativesAtEnd" specifies the type of continuity between this curve segment and its successor. If this is the last curve segment in the curve, one of these values, as appropriate, is ignored. The default value of "0" means simple continuity, which is a mandatory minimum level of continuity. This level is referred to as "C 0 " in mathematical texts. A value of 1 means that the function and its first derivative are continuous at the appropriate end point: "C 1 " continuity. A value of "n" for any integer means the function and its first n derivatives are continuous: "C n " continuity. NOTE: Use of these values is only appropriate when the basic curve definition is an underdetermined system. For example, line string segments cannot support continuity above C 0 , since there is no spare control parameter to adjust the incoming angle at the end points of the segment. Spline functions on the other hand often have extra degrees of freedom on end segments that allow them to adjust the values of the derivatives to support C 1 or higher continuity.
numDerivativesAtStart integer 0 optional
The attribute "numDerivativesAtStart" specifies the type of continuity between this curve segment and its predecessor. If this is the first curve segment in the curve, one of these values, as appropriate, is ignored. The default value of "0" means simple continuity, which is a mandatory minimum level of continuity. This level is referred to as "C 0 " in mathematical texts. A value of 1 means that the function and its first derivative are continuous at the appropriate end point: "C 1 " continuity. A value of "n" for any integer means the function and its first n derivatives are continuous: "C n " continuity. NOTE: Use of these values is only appropriate when the basic curve definition is an underdetermined system. For example, line string segments cannot support continuity above C 0 , since there is no spare control parameter to adjust the incoming angle at the end points of the segment. Spline functions on the other hand often have extra degrees of freedom on end segments that allow them to adjust the values of the derivatives to support C 1 or higher continuity.
Source
<complexType name="BezierType">
  <annotation>
    <documentation>Bezier curves are polynomial splines that use Bezier or Bernstein polynomials for interpolation purposes. It is a special case of the B-Spline curve with two knots.</documentation>
  </annotation>
  <complexContent>
    <restriction base="gml:BSplineType">
      <sequence>
        <choice>
          <annotation>
            <documentation>GML supports two different ways to specify the control points of a curve segment.
1. A sequence of "pos" (DirectPositionType) or "pointProperty" (PointPropertyType) elements. "pos" elements are control points that are only part of this curve segment, "pointProperty" elements contain a point that may be referenced from other geometry elements or reference another point defined outside of this curve segment (reuse of existing points).
2. The "posList" element allows for a compact way to specifiy the coordinates of the control points, if all control points are in the same coordinate reference systems and belong to this curve segment only.</documentation>
          </annotation>
          <choice minOccurs="0" maxOccurs="unbounded">
            <element ref="gml:pos"/>
            <element ref="gml:pointProperty"/>
            <element ref="gml:pointRep">
              <annotation>
                <documentation>Deprecated with GML version 3.1.0. Use "pointProperty" instead. Included for backwards compatibility with GML 3.0.0.</documentation>
              </annotation>
            </element>
          </choice>
          <element ref="gml:posList"/>
          <element ref="gml:coordinates">
            <annotation>
              <documentation>Deprecated with GML version 3.1.0. Use "posList" instead.</documentation>
            </annotation>
          </element>
        </choice>
        <element name="degree" type="nonNegativeInteger">
          <annotation>
            <documentation>The attribute "degree" shall be the degree of the polynomial used for interpolation in this spline.</documentation>
          </annotation>
        </element>
        <element name="knot" type="gml:KnotPropertyType" minOccurs="2" maxOccurs="2">
          <annotation>
            <documentation>The property "knot" shall be the sequence of distinct knots used to define the spline basis functions.</documentation>
          </annotation>
        </element>
      </sequence>
      <attribute name="interpolation" type="gml:CurveInterpolationType" fixed="polynomialSpline">
        <annotation>
          <documentation>The attribute "interpolation" specifies the curve interpolation mechanism used for this segment. This mechanism
uses the control points and control parameters to determine the position of this curve segment. For a Bezier the interpolation is fixed as "polynomialSpline".</documentation>
        </annotation>
      </attribute>
      <attribute name="isPolynomial" type="boolean" fixed="true">
        <annotation>
          <documentation>The attribute isPolynomial is set to true as this is a polynomial spline.</documentation>
        </annotation>
      </attribute>
      <attribute name="knotType" type="gml:KnotTypesType" use="prohibited">
        <annotation>
          <documentation>The property "knotType" is not relevant for Bezier curve segments.</documentation>
        </annotation>
      </attribute>
    </restriction>
  </complexContent>
</complexType>
Complex Type gml:SurfaceType
Namespace http://www.opengis.net/gml
Annotations
A Surface is a 2-dimensional primitive and is composed of one or more surface patches. The surface patches are connected to one another. The orientation of the surface is positive ("up"). The orientation of a surface chooses an "up" direction through the choice of the upward normal, which, if the surface is not a cycle, is the side of the surface from which the exterior boundary appears counterclockwise. Reversal of the surface orientation reverses the curve orientation of each boundary component, and interchanges the conceptual "up" and "down" direction of the surface. If the surface is the boundary of a solid, the "up" direction is usually outward. For closed surfaces, which have no boundary, the up direction is that of the surface patches, which must be consistent with one another. Its included surface patches describe the interior structure of the Surface.
Diagram
Diagram index2.tmp#id763 index2.tmp#id729 index2.tmp#id749 index2.tmp#id751 index2.tmp#id728 index2.tmp#id727 index6.tmp#id764 index6.tmp#id765 index6.tmp#id726 index6.tmp#id725 index32.tmp#id803 index5.tmp#id1726
Type extension of gml:AbstractSurfaceType
Type hierarchy
Used by
Model gml:metaDataProperty* , gml:description{0,1} , gml:name* , gml:patches
Children gml:description, gml:metaDataProperty, gml:name, gml:patches
Attributes
QName Type Fixed Default Use Annotation
axisLabels gml:NCNameList optional
Ordered list of labels for all the axes of this CRS. The gml:axisAbbrev value should be used for these axis labels, after spaces and forbiddden characters are removed. When the srsName attribute is included, this attribute is optional. When the srsName attribute is omitted, this attribute shall also be omitted.
gid string optional
This attribute is included for backward compatibility with GML 2 and is deprecated with GML 3. This identifer is superceded by "gml:id" inherited from AbstractGMLType. The attribute "gid" should not be used anymore and may be deleted in future versions of GML without further notice.
gml:id ID optional
Database handle for the object. It is of XML type ID, so is constrained to be unique in the XML document within which it occurs. An external identifier for the object in the form of a URI may be constructed using standard XML and XPointer methods. This is done by concatenating the URI for the document, a fragment separator, and the value of the id attribute.
srsDimension positiveInteger optional
The "srsDimension" is the length of coordinate sequence (the number of entries in the list). This dimension is specified by the coordinate reference system. When the srsName attribute is omitted, this attribute shall be omitted.
srsName anyURI optional
In general this reference points to a CRS instance of gml:CoordinateReferenceSystemType (see coordinateReferenceSystems.xsd). For well known references it is not required that the CRS description exists at the location the URI points to. If no srsName attribute is given, the CRS must be specified as part of the larger context this geometry element is part of, e.g. a geometric element like point, curve, etc. It is expected that this attribute will be specified at the direct position level only in rare cases.
uomLabels gml:NCNameList optional
Ordered list of unit of measure (uom) labels for all the axes of this CRS. The value of the string in the gml:catalogSymbol should be used for this uom labels, after spaces and forbiddden characters are removed. When the axisLabels attribute is included, this attribute shall also be included. When the axisLabels attribute is omitted, this attribute shall also be omitted.
Source
<complexType name="SurfaceType">
  <annotation>
    <documentation>A Surface is a 2-dimensional primitive and is composed of one or more surface patches. The surface patches are connected to one another.
				The orientation of the surface is positive ("up"). The orientation of a surface chooses an "up" direction through the choice of the upward normal, which, if the surface is not a cycle, is the side of the surface from which the exterior boundary appears counterclockwise. Reversal of the surface orientation reverses the curve orientation of each boundary component, and interchanges the conceptual "up" and "down" direction of the surface. If the surface is the boundary of a solid, the "up" direction is usually outward. For closed surfaces, which have no boundary, the up direction is that of the surface patches, which must be consistent with one another. Its included surface patches describe the interior structure of the Surface.</documentation>
  </annotation>
  <complexContent>
    <extension base="gml:AbstractSurfaceType">
      <sequence>
        <element ref="gml:patches">
          <annotation>
            <documentation>This element encapsulates the patches of the surface.</documentation>
          </annotation>
        </element>
      </sequence>
    </extension>
  </complexContent>
</complexType>
Complex Type gml:SurfacePatchArrayPropertyType
Namespace http://www.opengis.net/gml
Annotations
A container for an array of surface patches.
Diagram
Diagram index5.tmp#id1730
Used by
Model gml:_SurfacePatch
Children gml:_SurfacePatch
Source
<complexType name="SurfacePatchArrayPropertyType">
  <annotation>
    <documentation>A container for an array of surface patches.</documentation>
  </annotation>
  <sequence minOccurs="0" maxOccurs="unbounded">
    <element ref="gml:_SurfacePatch"/>
  </sequence>
</complexType>
Complex Type gml:AbstractSurfacePatchType
Namespace http://www.opengis.net/gml
Annotations
A surface patch defines a homogenuous portion of a surface.
Diagram
Diagram
Properties
abstract: true
Used by
Model
Source
<complexType name="AbstractSurfacePatchType" abstract="true">
  <annotation>
    <documentation>A surface patch defines a homogenuous portion of a surface.</documentation>
  </annotation>
  <sequence/>
</complexType>
Complex Type gml:OrientableSurfaceType
Namespace http://www.opengis.net/gml
Annotations
OrientableSurface consists of a surface and an orientation. If the orientation is "+", then the OrientableSurface is identical to the baseSurface. If the orientation is "-", then the OrientableSurface is a reference to a Surface with an up-normal that reverses the direction for this OrientableSurface, the sense of "the top of the surface".
Diagram
Diagram index2.tmp#id763 index2.tmp#id729 index2.tmp#id749 index2.tmp#id751 index2.tmp#id728 index2.tmp#id727 index6.tmp#id764 index6.tmp#id765 index6.tmp#id726 index6.tmp#id725 index32.tmp#id803 index5.tmp#id1740 index5.tmp#id1738
Type extension of gml:AbstractSurfaceType
Type hierarchy
Used by
Model gml:metaDataProperty* , gml:description{0,1} , gml:name* , gml:baseSurface
Children gml:baseSurface, gml:description, gml:metaDataProperty, gml:name
Attributes
QName Type Fixed Default Use Annotation
axisLabels gml:NCNameList optional
Ordered list of labels for all the axes of this CRS. The gml:axisAbbrev value should be used for these axis labels, after spaces and forbiddden characters are removed. When the srsName attribute is included, this attribute is optional. When the srsName attribute is omitted, this attribute shall also be omitted.
gid string optional
This attribute is included for backward compatibility with GML 2 and is deprecated with GML 3. This identifer is superceded by "gml:id" inherited from AbstractGMLType. The attribute "gid" should not be used anymore and may be deleted in future versions of GML without further notice.
gml:id ID optional
Database handle for the object. It is of XML type ID, so is constrained to be unique in the XML document within which it occurs. An external identifier for the object in the form of a URI may be constructed using standard XML and XPointer methods. This is done by concatenating the URI for the document, a fragment separator, and the value of the id attribute.
orientation gml:SignType + optional
If the orientation is "+", then the OrientableSurface is identical to the baseSurface. If the orientation is "-", then the OrientableSurface is a reference to a Surface with an up-normal that reverses the direction for this OrientableSurface, the sense of "the top of the surface". "+" is the default value.
srsDimension positiveInteger optional
The "srsDimension" is the length of coordinate sequence (the number of entries in the list). This dimension is specified by the coordinate reference system. When the srsName attribute is omitted, this attribute shall be omitted.
srsName anyURI optional
In general this reference points to a CRS instance of gml:CoordinateReferenceSystemType (see coordinateReferenceSystems.xsd). For well known references it is not required that the CRS description exists at the location the URI points to. If no srsName attribute is given, the CRS must be specified as part of the larger context this geometry element is part of, e.g. a geometric element like point, curve, etc. It is expected that this attribute will be specified at the direct position level only in rare cases.
uomLabels gml:NCNameList optional
Ordered list of unit of measure (uom) labels for all the axes of this CRS. The value of the string in the gml:catalogSymbol should be used for this uom labels, after spaces and forbiddden characters are removed. When the axisLabels attribute is included, this attribute shall also be included. When the axisLabels attribute is omitted, this attribute shall also be omitted.
Source
<complexType name="OrientableSurfaceType">
  <annotation>
    <documentation>OrientableSurface consists of a surface and an orientation. If the orientation is "+", then the OrientableSurface is identical to the baseSurface. If the orientation is "-", then the OrientableSurface is a reference to a Surface with an up-normal that reverses the direction for this OrientableSurface, the sense of "the top of the surface".</documentation>
  </annotation>
  <complexContent>
    <extension base="gml:AbstractSurfaceType">
      <sequence>
        <element ref="gml:baseSurface">
          <annotation>
            <documentation>References or contains the base surface (positive orientation).</documentation>
          </annotation>
        </element>
      </sequence>
      <attribute name="orientation" type="gml:SignType" default="+">
        <annotation>
          <documentation>If the orientation is "+", then the OrientableSurface is identical to the baseSurface. If the orientation is "-", then the OrientableSurface is a reference to a Surface with an up-normal that reverses the direction for this OrientableSurface, the sense of "the top of the surface". "+" is the default value.</documentation>
        </annotation>
      </attribute>
    </extension>
  </complexContent>
</complexType>
Complex Type gml:PolygonPatchType
Namespace http://www.opengis.net/gml
Annotations
A PolygonPatch is a surface patch that is defined by a set of boundary curves and an underlying surface to which these curves adhere. The curves are coplanar and the polygon uses planar interpolation in its interior. Implements GM_Polygon of ISO 19107.
Diagram
Diagram index5.tmp#id1737 index5.tmp#id1742 index32.tmp#id804 index32.tmp#id812
Type extension of gml:AbstractSurfacePatchType
Type hierarchy
Used by
Model gml:exterior{0,1} , gml:interior*
Children gml:exterior, gml:interior
Attributes
QName Type Fixed Default Use Annotation
interpolation gml:SurfaceInterpolationType planar optional
The attribute "interpolation" specifies the interpolation mechanism used for this surface patch. Currently only planar surface patches are defined in GML 3, the attribute is fixed to "planar", i.e. the interpolation method shall return points on a single plane. The boundary of the patch shall be contained within that plane.
Source
<complexType name="PolygonPatchType">
  <annotation>
    <documentation>A PolygonPatch is a surface patch that is defined by a set of boundary curves and an underlying surface to which these curves adhere. The curves are coplanar and the polygon uses planar interpolation in its interior. Implements GM_Polygon of ISO 19107.</documentation>
  </annotation>
  <complexContent>
    <extension base="gml:AbstractSurfacePatchType">
      <sequence>
        <element ref="gml:exterior" minOccurs="0"/>
        <element ref="gml:interior" minOccurs="0" maxOccurs="unbounded"/>
      </sequence>
      <attribute name="interpolation" type="gml:SurfaceInterpolationType" fixed="planar">
        <annotation>
          <documentation>The attribute "interpolation" specifies the interpolation mechanism used for this surface patch. Currently only planar surface patches are defined in GML 3, the attribute is fixed to "planar", i.e. the interpolation method shall return points on a single plane. The boundary of the patch shall be contained within that plane.</documentation>
        </annotation>
      </attribute>
    </extension>
  </complexContent>
</complexType>
Simple Type gml:SurfaceInterpolationType
Namespace http://www.opengis.net/gml
Annotations
SurfaceInterpolationType is a list of codes that may be used to identify the interpolation mechanisms specified by an application schema.
Diagram
Diagram
Type restriction of string
Facets
enumeration none
enumeration planar
enumeration spherical
enumeration elliptical
enumeration conic
enumeration tin
enumeration parametricCurve
enumeration polynomialSpline
enumeration rationalSpline
enumeration triangulatedSpline
Used by
Source
<simpleType name="SurfaceInterpolationType">
  <annotation>
    <documentation>SurfaceInterpolationType is a list of codes that may be used to identify the interpolation mechanisms specified by an
application schema.</documentation>
  </annotation>
  <restriction base="string">
    <enumeration value="none"/>
    <enumeration value="planar"/>
    <enumeration value="spherical"/>
    <enumeration value="elliptical"/>
    <enumeration value="conic"/>
    <enumeration value="tin"/>
    <enumeration value="parametricCurve"/>
    <enumeration value="polynomialSpline"/>
    <enumeration value="rationalSpline"/>
    <enumeration value="triangulatedSpline"/>
  </restriction>
</simpleType>
Complex Type gml:TriangleType
Namespace http://www.opengis.net/gml
Annotations
Represents a triangle as a surface with an outer boundary consisting of a linear ring. Note that this is a polygon (subtype) with no inner boundaries. The number of points in the linear ring must be four.
Diagram
Diagram index5.tmp#id1737 index5.tmp#id1745 index32.tmp#id804
Type extension of gml:AbstractSurfacePatchType
Type hierarchy
Used by
Element gml:Triangle
Model gml:exterior
Children gml:exterior
Attributes
QName Type Fixed Default Use Annotation
interpolation gml:SurfaceInterpolationType planar optional
The attribute "interpolation" specifies the interpolation mechanism used for this surface patch. Currently only planar surface patches are defined in GML 3, the attribute is fixed to "planar", i.e. the interpolation method shall return points on a single plane. The boundary of the patch shall be contained within that plane.
Source
<complexType name="TriangleType">
  <annotation>
    <documentation>Represents a triangle as a surface with an outer boundary consisting of a linear ring. Note that this is a polygon (subtype) with no inner boundaries. The number of points in the linear ring must be four.</documentation>
  </annotation>
  <complexContent>
    <extension base="gml:AbstractSurfacePatchType">
      <sequence>
        <element ref="gml:exterior">
          <annotation>
            <documentation>Constraint: The Ring shall be a LinearRing and must form a triangle, the first and the last position must be co-incident.</documentation>
          </annotation>
        </element>
      </sequence>
      <attribute name="interpolation" type="gml:SurfaceInterpolationType" fixed="planar">
        <annotation>
          <documentation>The attribute "interpolation" specifies the interpolation mechanism used for this surface patch. Currently only planar surface patches are defined in GML 3, the attribute is fixed to "planar", i.e. the interpolation method shall return points on a single plane. The boundary of the patch shall be contained within that plane.</documentation>
        </annotation>
      </attribute>
    </extension>
  </complexContent>
</complexType>
Complex Type gml:RectangleType
Namespace http://www.opengis.net/gml
Annotations
Represents a rectangle as a surface with an outer boundary consisting of a linear ring. Note that this is a polygon (subtype) with no inner boundaries. The number of points in the linear ring must be five.
Diagram
Diagram index5.tmp#id1737 index5.tmp#id1747 index32.tmp#id804
Type extension of gml:AbstractSurfacePatchType
Type hierarchy
Used by
Element gml:Rectangle
Model gml:exterior
Children gml:exterior
Attributes
QName Type Fixed Default Use Annotation
interpolation gml:SurfaceInterpolationType planar optional
The attribute "interpolation" specifies the interpolation mechanism used for this surface patch. Currently only planar surface patches are defined in GML 3, the attribute is fixed to "planar", i.e. the interpolation method shall return points on a single plane. The boundary of the patch shall be contained within that plane.
Source
<complexType name="RectangleType">
  <annotation>
    <documentation>Represents a rectangle as a surface with an outer boundary consisting of a linear ring. Note that this is a polygon (subtype) with no inner boundaries. The number of points in the linear ring must be five.</documentation>
  </annotation>
  <complexContent>
    <extension base="gml:AbstractSurfacePatchType">
      <sequence>
        <element ref="gml:exterior">
          <annotation>
            <documentation>Constraint: The Ring shall be a LinearRing and must form a rectangle; the first and the last position must be co-incident.</documentation>
          </annotation>
        </element>
      </sequence>
      <attribute name="interpolation" type="gml:SurfaceInterpolationType" fixed="planar">
        <annotation>
          <documentation>The attribute "interpolation" specifies the interpolation mechanism used for this surface patch. Currently only planar surface patches are defined in GML 3, the attribute is fixed to "planar", i.e. the interpolation method shall return points on a single plane. The boundary of the patch shall be contained within that plane.</documentation>
        </annotation>
      </attribute>
    </extension>
  </complexContent>
</complexType>
Complex Type gml:RingType
Namespace http://www.opengis.net/gml
Annotations
A Ring is used to represent a single connected component of a surface boundary. It consists of a sequence of curves connected in a cycle (an object whose boundary is empty). A Ring is structurally similar to a composite curve in that the endPoint of each curve in the sequence is the startPoint of the next curve in the Sequence. Since the sequence is circular, there is no exception to this rule. Each ring, like all boundaries, is a cycle and each ring is simple. NOTE: Even though each Ring is simple, the boundary need not be simple. The easiest case of this is where one of the interior rings of a surface is tangent to its exterior ring.
Diagram
Diagram index2.tmp#id763 index2.tmp#id729 index2.tmp#id749 index2.tmp#id751 index2.tmp#id728 index2.tmp#id727 index6.tmp#id764 index6.tmp#id765 index6.tmp#id726 index32.tmp#id811 index5.tmp#id1587
Type extension of gml:AbstractRingType
Type hierarchy
Used by
Element gml:Ring
Model gml:metaDataProperty* , gml:description{0,1} , gml:name* , gml:curveMember+
Children gml:curveMember, gml:description, gml:metaDataProperty, gml:name
Attributes
QName Type Fixed Default Use Annotation
axisLabels gml:NCNameList optional
Ordered list of labels for all the axes of this CRS. The gml:axisAbbrev value should be used for these axis labels, after spaces and forbiddden characters are removed. When the srsName attribute is included, this attribute is optional. When the srsName attribute is omitted, this attribute shall also be omitted.
gid string optional
This attribute is included for backward compatibility with GML 2 and is deprecated with GML 3. This identifer is superceded by "gml:id" inherited from AbstractGMLType. The attribute "gid" should not be used anymore and may be deleted in future versions of GML without further notice.
gml:id ID optional
Database handle for the object. It is of XML type ID, so is constrained to be unique in the XML document within which it occurs. An external identifier for the object in the form of a URI may be constructed using standard XML and XPointer methods. This is done by concatenating the URI for the document, a fragment separator, and the value of the id attribute.
srsDimension positiveInteger optional
The "srsDimension" is the length of coordinate sequence (the number of entries in the list). This dimension is specified by the coordinate reference system. When the srsName attribute is omitted, this attribute shall be omitted.
srsName anyURI optional
In general this reference points to a CRS instance of gml:CoordinateReferenceSystemType (see coordinateReferenceSystems.xsd). For well known references it is not required that the CRS description exists at the location the URI points to. If no srsName attribute is given, the CRS must be specified as part of the larger context this geometry element is part of, e.g. a geometric element like point, curve, etc. It is expected that this attribute will be specified at the direct position level only in rare cases.
uomLabels gml:NCNameList optional
Ordered list of unit of measure (uom) labels for all the axes of this CRS. The value of the string in the gml:catalogSymbol should be used for this uom labels, after spaces and forbiddden characters are removed. When the axisLabels attribute is included, this attribute shall also be included. When the axisLabels attribute is omitted, this attribute shall also be omitted.
Source
<complexType name="RingType">
  <annotation>
    <documentation>A Ring is used to represent a single connected component of a surface boundary. It consists of a sequence of curves connected in a cycle (an object whose boundary is empty).
A Ring is structurally similar to a composite curve in that the endPoint of each curve in the sequence is the startPoint of the next curve in the Sequence. Since the sequence is circular, there is no exception to this rule. Each ring, like all boundaries, is a cycle and each ring is simple.
NOTE: Even though each Ring is simple, the boundary need not be simple. The easiest case of this is where one of the interior rings of a surface is tangent to its exterior ring.</documentation>
  </annotation>
  <complexContent>
    <extension base="gml:AbstractRingType">
      <sequence>
        <element ref="gml:curveMember" maxOccurs="unbounded">
          <annotation>
            <documentation>This element references or contains one curve in the composite curve. The curves are contiguous, the collection of curves is ordered.
NOTE: This definition allows for a nested structure, i.e. a CompositeCurve may use, for example, another CompositeCurve as a curve member.</documentation>
          </annotation>
        </element>
      </sequence>
    </extension>
  </complexContent>
</complexType>
Complex Type gml:RingPropertyType
Namespace http://www.opengis.net/gml
Annotations
Encapsulates a ring to represent properties in features or geometry collections.
Diagram
Diagram index5.tmp#id809
Model gml:Ring
Children gml:Ring
Source
<complexType name="RingPropertyType">
  <annotation>
    <documentation>Encapsulates a ring to represent properties in features or geometry collections.</documentation>
  </annotation>
  <sequence>
    <element ref="gml:Ring"/>
  </sequence>
</complexType>
Complex Type gml:AbstractParametricCurveSurfaceType
Namespace http://www.opengis.net/gml
Annotations
Diagram
Diagram index5.tmp#id1737
Type extension of gml:AbstractSurfacePatchType
Type hierarchy
Used by
Model
Source
<complexType name="AbstractParametricCurveSurfaceType">
  <annotation>
    <documentation>
    </documentation>
  </annotation>
  <complexContent>
    <extension base="gml:AbstractSurfacePatchType"/>
  </complexContent>
</complexType>
Complex Type gml:AbstractGriddedSurfaceType
Namespace http://www.opengis.net/gml
Annotations
A gridded surface is a parametric curve surface derived from a rectangular grid in the parameter space. The rows from this grid are control points for horizontal surface curves; the columns are control points for vertical surface curves. The working assumption is that for a pair of parametric co-ordinates (s, t) that the horizontal curves for each integer offset are calculated and evaluated at "s". The defines a sequence of control points: cn(s) : s 1 .....columns From this sequence a vertical curve is calculated for "s", and evaluated at "t". In most cases, the order of calculation (horizontal-vertical vs. vertical-horizontal) does not make a difference. Where it does, the horizontal- vertical order shall be the one used. Logically, any pair of curve interpolation types can lead to a subtype of GriddedSurface. The following clauses define some most commonly encountered surfaces that can be represented in this manner.
Diagram
Diagram index5.tmp#id1737 index5.tmp#id1753 index5.tmp#id1751 index5.tmp#id1750 index5.tmp#id1756 index5.tmp#id1757
Type extension of gml:AbstractParametricCurveSurfaceType
Type hierarchy
Used by
Model gml:row+ , gml:rows{0,1} , gml:columns{0,1}
Children gml:columns, gml:row, gml:rows
Source
<complexType name="AbstractGriddedSurfaceType">
  <annotation>
    <documentation>A gridded surface is a parametric curve
   surface derived from a rectangular grid in the parameter
   space. The rows from this grid are control points for
   horizontal surface curves; the columns are control points
   for vertical surface curves. The working assumption is that
   for a pair of parametric co-ordinates (s, t) that the
   horizontal curves for each integer offset are calculated
   and evaluated at "s". The defines a sequence of control
   points:
   
   cn(s) : s  1 .....columns 

   From this sequence a vertical curve is calculated for "s",
   and evaluated at "t". In most cases, the order of
   calculation (horizontal-vertical vs. vertical-horizontal)
   does not make a difference. Where it does, the horizontal-   
   vertical order shall be the one used.

   Logically, any pair of curve interpolation types can lead
   to a subtype of GriddedSurface. The following clauses
   define some most commonly encountered surfaces that can
   be represented in this manner.</documentation>
  </annotation>
  <complexContent>
    <extension base="gml:AbstractParametricCurveSurfaceType">
      <sequence>
        <group ref="gml:PointGrid">
          <annotation>
            <documentation>This is the double indexed sequence
       of control points, given in row major form. 
       NOTE! There in no assumption made about the shape
       of the grid. 
       For example, the positions need not effect a "21/2D"
       surface, consecutive points may be equal in any or all
       of the ordinates. Further, the curves in either or both
       directions may close.</documentation>
          </annotation>
        </group>
        <element name="rows" type="integer" minOccurs="0">
          <annotation>
            <documentation>The attribute rows gives the number
         of rows in the parameter grid.</documentation>
          </annotation>
        </element>
        <element name="columns" type="integer" minOccurs="0">
          <annotation>
            <documentation>The attribute columns gives the number
        of columns in the parameter grid.</documentation>
          </annotation>
        </element>
      </sequence>
    </extension>
  </complexContent>
</complexType>
Complex Type gml:ConeType
Namespace http://www.opengis.net/gml
Annotations
A cone is a gridded surface given as a family of conic sections whose control points vary linearly. NOTE! A 5-point ellipse with all defining positions identical is a point. Thus, a truncated elliptical cone can be given as a 2x5 set of control points ((P1, P1, P1, P1, P1), (P2, P3, P4, P5, P6)). P1 is the apex of the cone. P2, P3,P4, P5 and P6 are any five distinct points around the base ellipse of the cone. If the horizontal curves are circles as opposed to ellipses, the a circular cone can be constructed using ((P1, P1, P1),(P2, P3, P4)). The apex most not coinside with the other plane.
Diagram
Diagram index5.tmp#id1737 index5.tmp#id1753 index5.tmp#id1751 index5.tmp#id1750 index5.tmp#id1756 index5.tmp#id1757 index5.tmp#id1755 index5.tmp#id1759 index5.tmp#id1760
Type extension of gml:AbstractGriddedSurfaceType
Type hierarchy
Used by
Element gml:Cone
Model gml:row+ , gml:rows{0,1} , gml:columns{0,1}
Children gml:columns, gml:row, gml:rows
Attributes
QName Type Fixed Default Use Annotation
horizontalCurveType gml:CurveInterpolationType circularArc3Points optional
verticalCurveType gml:CurveInterpolationType linear optional
Source
<complexType name="ConeType">
  <annotation>
    <documentation>A cone is a gridded surface given as a
   family of conic sections whose control points vary linearly.
   NOTE! A 5-point ellipse with all defining positions identical
   is a point. Thus, a truncated elliptical cone can be given as a
   2x5 set of control points
   ((P1, P1, P1, P1, P1), (P2, P3, P4, P5, P6)). P1 is the apex 
   of the cone. P2, P3,P4, P5 and P6 are any five distinct points
   around the base ellipse of the cone. If the horizontal curves
   are circles as opposed to ellipses, the a circular cone can
   be constructed using ((P1, P1, P1),(P2, P3, P4)). The apex most     
   not coinside with the other plane.</documentation>
  </annotation>
  <complexContent>
    <extension base="gml:AbstractGriddedSurfaceType">
      <attribute name="horizontalCurveType" type="gml:CurveInterpolationType" fixed="circularArc3Points"/>
      <attribute name="verticalCurveType" type="gml:CurveInterpolationType" fixed="linear"/>
    </extension>
  </complexContent>
</complexType>
Complex Type gml:CylinderType
Namespace http://www.opengis.net/gml
Annotations
A cylinder is a gridded surface given as a family of circles whose positions vary along a set of parallel lines, keeping the cross sectional horizontal curves of a constant shape. NOTE! Given the same working assumptions as in the previous note, a Cylinder can be given by two circles, giving us the control points of the form ((P1, P2, P3),(P4, P5, P6)).
Diagram
Diagram index5.tmp#id1737 index5.tmp#id1753 index5.tmp#id1751 index5.tmp#id1750 index5.tmp#id1756 index5.tmp#id1757 index5.tmp#id1755 index5.tmp#id1762 index5.tmp#id1763
Type extension of gml:AbstractGriddedSurfaceType
Type hierarchy
Used by
Element gml:Cylinder
Model gml:row+ , gml:rows{0,1} , gml:columns{0,1}
Children gml:columns, gml:row, gml:rows
Attributes
QName Type Fixed Default Use Annotation
horizontalCurveType gml:CurveInterpolationType circularArc3Points optional
verticalCurveType gml:CurveInterpolationType linear optional
Source
<complexType name="CylinderType">
  <annotation>
    <documentation>A cylinder is a gridded surface given as a
   family of circles whose positions vary along a set of parallel
   lines, keeping the cross sectional horizontal curves of a
   constant shape.
   NOTE! Given the same working assumptions as in the previous
   note, a Cylinder can be given by two circles, giving us the
   control points of the form ((P1, P2, P3),(P4, P5, P6)).</documentation>
  </annotation>
  <complexContent>
    <extension base="gml:AbstractGriddedSurfaceType">
      <attribute name="horizontalCurveType" type="gml:CurveInterpolationType" fixed="circularArc3Points"/>
      <attribute name="verticalCurveType" type="gml:CurveInterpolationType" fixed="linear"/>
    </extension>
  </complexContent>
</complexType>
Complex Type gml:SphereType
Namespace http://www.opengis.net/gml
Annotations
A sphere is a gridded surface given as a family of circles whose positions vary linearly along the axis of the sphere, and whise radius varies in proportions to the cosine function of the central angle. The horizontal circles resemble lines of constant latitude, and the vertical arcs resemble lines of constant longitude. NOTE! If the control points are sorted in terms of increasing longitude, and increasing latitude, the upNormal of a sphere is the outward normal. EXAMPLE If we take a gridded set of latitudes and longitudes in degrees,(u,v) such as (-90,-180) (-90,-90) (-90,0) (-90, 90) (-90, 180) (-45,-180) (-45,-90) (-45,0) (-45, 90) (-45, 180) ( 0,-180) ( 0,-90) ( 0,0) ( 0, 90) ( 0, 180) ( 45,-180) ( 45,-90) ( 45,0) ( 45, -90) ( 45, 180) ( 90,-180) ( 90,-90) ( 90,0) ( 90, -90) ( 90, 180) And map these points to 3D using the usual equations (where R is the radius of the required sphere). z = R sin u x = (R cos u)(sin v) y = (R cos u)(cos v) We have a sphere of Radius R, centred at (0,0), as a gridded surface. Notice that the entire first row and the entire last row of the control points map to a single point in each 3D Euclidean space, North and South poles respectively, and that each horizontal curve closes back on itself forming a geometric cycle. This gives us a metrically bounded (of finite size), topologically unbounded (not having a boundary, a cycle) surface.
Diagram
Diagram index5.tmp#id1737 index5.tmp#id1753 index5.tmp#id1751 index5.tmp#id1750 index5.tmp#id1756 index5.tmp#id1757 index5.tmp#id1755 index5.tmp#id1765 index5.tmp#id1766
Type extension of gml:AbstractGriddedSurfaceType
Type hierarchy
Used by
Element gml:Sphere
Model gml:row+ , gml:rows{0,1} , gml:columns{0,1}
Children gml:columns, gml:row, gml:rows
Attributes
QName Type Fixed Default Use Annotation
horizontalCurveType gml:CurveInterpolationType circularArc3Points optional
verticalCurveType gml:CurveInterpolationType circularArc3Points optional
Source
<complexType name="SphereType">
  <annotation>
    <documentation>A sphere is a gridded surface given as a
   family of circles whose positions vary linearly along the
   axis of the sphere, and whise radius varies in proportions to
   the cosine function of the central angle. The horizontal 
   circles resemble lines of constant latitude, and the vertical
   arcs resemble lines of constant longitude. 
   NOTE! If the control points are sorted in terms of increasing
   longitude, and increasing latitude, the upNormal of a sphere
   is the outward normal.
   EXAMPLE If we take a gridded set of latitudes and longitudes
   in degrees,(u,v) such as

	(-90,-180)  (-90,-90)  (-90,0)  (-90,  90) (-90, 180) 
	(-45,-180)  (-45,-90)  (-45,0)  (-45,  90) (-45, 180) 
	(  0,-180)  (  0,-90)  (  0,0)  (  0,  90) (  0, 180)
	( 45,-180)  ( 45,-90)  ( 45,0)  ( 45, -90) ( 45, 180)
	( 90,-180)  ( 90,-90)  ( 90,0)  ( 90, -90) ( 90, 180)
   
   And map these points to 3D using the usual equations (where R
   is the radius of the required sphere).

    z = R sin u
    x = (R cos u)(sin v)
    y = (R cos u)(cos v)

   We have a sphere of Radius R, centred at (0,0), as a gridded
   surface. Notice that the entire first row and the entire last
   row of the control points map to a single point in each 3D
   Euclidean space, North and South poles respectively, and that
   each horizontal curve closes back on itself forming a 
   geometric cycle. This gives us a metrically bounded (of finite
   size), topologically unbounded (not having a boundary, a
   cycle) surface.</documentation>
  </annotation>
  <complexContent>
    <extension base="gml:AbstractGriddedSurfaceType">
      <attribute name="horizontalCurveType" type="gml:CurveInterpolationType" fixed="circularArc3Points"/>
      <attribute name="verticalCurveType" type="gml:CurveInterpolationType" fixed="circularArc3Points"/>
    </extension>
  </complexContent>
</complexType>
Complex Type gml:PolyhedralSurfaceType
Namespace http://www.opengis.net/gml
Annotations
A polyhedral surface is a surface composed of polygon surfaces connected along their common boundary curves. This differs from the surface type only in the restriction on the types of surface patches acceptable.
Diagram
Diagram index2.tmp#id763 index2.tmp#id729 index2.tmp#id729 index2.tmp#id749 index2.tmp#id749 index2.tmp#id751 index2.tmp#id751 index2.tmp#id728 index2.tmp#id727 index6.tmp#id764 index6.tmp#id765 index6.tmp#id726 index6.tmp#id725 index32.tmp#id803 index5.tmp#id1726 index5.tmp#id1725 index2.tmp#id729 index2.tmp#id729 index2.tmp#id749 index2.tmp#id749 index2.tmp#id751 index2.tmp#id751 index2.tmp#id728 index5.tmp#id1727
Type restriction of gml:SurfaceType
Type hierarchy
Used by
Model gml:metaDataProperty* , gml:description{0,1} , gml:name* , gml:polygonPatches
Children gml:description, gml:metaDataProperty, gml:name, gml:polygonPatches
Attributes
QName Type Fixed Default Use Annotation
axisLabels gml:NCNameList optional
Ordered list of labels for all the axes of this CRS. The gml:axisAbbrev value should be used for these axis labels, after spaces and forbiddden characters are removed. When the srsName attribute is included, this attribute is optional. When the srsName attribute is omitted, this attribute shall also be omitted.
gid string optional
This attribute is included for backward compatibility with GML 2 and is deprecated with GML 3. This identifer is superceded by "gml:id" inherited from AbstractGMLType. The attribute "gid" should not be used anymore and may be deleted in future versions of GML without further notice.
gml:id ID optional
Database handle for the object. It is of XML type ID, so is constrained to be unique in the XML document within which it occurs. An external identifier for the object in the form of a URI may be constructed using standard XML and XPointer methods. This is done by concatenating the URI for the document, a fragment separator, and the value of the id attribute.
srsDimension positiveInteger optional
The "srsDimension" is the length of coordinate sequence (the number of entries in the list). This dimension is specified by the coordinate reference system. When the srsName attribute is omitted, this attribute shall be omitted.
srsName anyURI optional
In general this reference points to a CRS instance of gml:CoordinateReferenceSystemType (see coordinateReferenceSystems.xsd). For well known references it is not required that the CRS description exists at the location the URI points to. If no srsName attribute is given, the CRS must be specified as part of the larger context this geometry element is part of, e.g. a geometric element like point, curve, etc. It is expected that this attribute will be specified at the direct position level only in rare cases.
uomLabels gml:NCNameList optional
Ordered list of unit of measure (uom) labels for all the axes of this CRS. The value of the string in the gml:catalogSymbol should be used for this uom labels, after spaces and forbiddden characters are removed. When the axisLabels attribute is included, this attribute shall also be included. When the axisLabels attribute is omitted, this attribute shall also be omitted.
Source
<complexType name="PolyhedralSurfaceType">
  <annotation>
    <documentation>A polyhedral surface is a surface composed
   of polygon surfaces connected along their common boundary 
   curves. This differs from the surface type only in the
   restriction on the types of surface patches acceptable.</documentation>
  </annotation>
  <complexContent>
    <restriction base="gml:SurfaceType">
      <sequence>
        <group ref="gml:StandardObjectProperties"/>
        <element ref="gml:polygonPatches">
          <annotation>
            <documentation>This property encapsulates the patches of 
      the polyhedral surface.</documentation>
          </annotation>
        </element>
      </sequence>
    </restriction>
  </complexContent>
</complexType>
Complex Type gml:PolygonPatchArrayPropertyType
Namespace http://www.opengis.net/gml
Annotations
This type defines a container for an array of polygon patches.
Diagram
Diagram index5.tmp#id1730 index5.tmp#id1729 index5.tmp#id1731
Type restriction of gml:SurfacePatchArrayPropertyType
Type hierarchy
Used by
Model gml:PolygonPatch
Children gml:PolygonPatch
Source
<complexType name="PolygonPatchArrayPropertyType">
  <annotation>
    <documentation>This type defines a container for an array of 
   polygon patches.</documentation>
  </annotation>
  <complexContent>
    <restriction base="gml:SurfacePatchArrayPropertyType">
      <sequence minOccurs="0" maxOccurs="unbounded">
        <element ref="gml:PolygonPatch"/>
      </sequence>
    </restriction>
  </complexContent>
</complexType>
Complex Type gml:TrianglePatchArrayPropertyType
Namespace http://www.opengis.net/gml
Annotations
This type defines a container for an array of triangle patches.
Diagram
Diagram index5.tmp#id1730 index5.tmp#id1729 index5.tmp#id1732
Type restriction of gml:SurfacePatchArrayPropertyType
Type hierarchy
Used by
Model gml:Triangle
Children gml:Triangle
Source
<complexType name="TrianglePatchArrayPropertyType">
  <annotation>
    <documentation>This type defines a container for an array of 
     triangle patches.</documentation>
  </annotation>
  <complexContent>
    <restriction base="gml:SurfacePatchArrayPropertyType">
      <sequence minOccurs="0" maxOccurs="unbounded">
        <element ref="gml:Triangle"/>
      </sequence>
    </restriction>
  </complexContent>
</complexType>
Complex Type gml:TriangulatedSurfaceType
Namespace http://www.opengis.net/gml
Annotations
A triangulated surface is a polyhedral surface that is composed only of triangles. There is no restriction on how the triangulation is derived.
Diagram
Diagram index2.tmp#id763 index2.tmp#id729 index2.tmp#id729 index2.tmp#id749 index2.tmp#id749 index2.tmp#id751 index2.tmp#id751 index2.tmp#id728 index2.tmp#id727 index6.tmp#id764 index6.tmp#id765 index6.tmp#id726 index6.tmp#id725 index32.tmp#id803 index5.tmp#id1726 index5.tmp#id1725 index2.tmp#id729 index2.tmp#id729 index2.tmp#id749 index2.tmp#id749 index2.tmp#id751 index2.tmp#id751 index2.tmp#id728 index5.tmp#id1728
Type restriction of gml:SurfaceType
Type hierarchy
Used by
Element gml:TriangulatedSurface
Complex Type gml:TinType
Model gml:metaDataProperty* , gml:description{0,1} , gml:name* , gml:trianglePatches
Children gml:description, gml:metaDataProperty, gml:name, gml:trianglePatches
Attributes
QName Type Fixed Default Use Annotation
axisLabels gml:NCNameList optional
Ordered list of labels for all the axes of this CRS. The gml:axisAbbrev value should be used for these axis labels, after spaces and forbiddden characters are removed. When the srsName attribute is included, this attribute is optional. When the srsName attribute is omitted, this attribute shall also be omitted.
gid string optional
This attribute is included for backward compatibility with GML 2 and is deprecated with GML 3. This identifer is superceded by "gml:id" inherited from AbstractGMLType. The attribute "gid" should not be used anymore and may be deleted in future versions of GML without further notice.
gml:id ID optional
Database handle for the object. It is of XML type ID, so is constrained to be unique in the XML document within which it occurs. An external identifier for the object in the form of a URI may be constructed using standard XML and XPointer methods. This is done by concatenating the URI for the document, a fragment separator, and the value of the id attribute.
srsDimension positiveInteger optional
The "srsDimension" is the length of coordinate sequence (the number of entries in the list). This dimension is specified by the coordinate reference system. When the srsName attribute is omitted, this attribute shall be omitted.
srsName anyURI optional
In general this reference points to a CRS instance of gml:CoordinateReferenceSystemType (see coordinateReferenceSystems.xsd). For well known references it is not required that the CRS description exists at the location the URI points to. If no srsName attribute is given, the CRS must be specified as part of the larger context this geometry element is part of, e.g. a geometric element like point, curve, etc. It is expected that this attribute will be specified at the direct position level only in rare cases.
uomLabels gml:NCNameList optional
Ordered list of unit of measure (uom) labels for all the axes of this CRS. The value of the string in the gml:catalogSymbol should be used for this uom labels, after spaces and forbiddden characters are removed. When the axisLabels attribute is included, this attribute shall also be included. When the axisLabels attribute is omitted, this attribute shall also be omitted.
Source
<complexType name="TriangulatedSurfaceType">
  <annotation>
    <documentation>A triangulated surface is a polyhedral 
   surface that is composed only of triangles. There is no
   restriction on how the triangulation is derived.</documentation>
  </annotation>
  <complexContent>
    <restriction base="gml:SurfaceType">
      <sequence>
        <group ref="gml:StandardObjectProperties"/>
        <element ref="gml:trianglePatches">
          <annotation>
            <documentation>This property encapsulates the patches of 
      the triangulated surface.</documentation>
          </annotation>
        </element>
      </sequence>
    </restriction>
  </complexContent>
</complexType>
Complex Type gml:TinType
Namespace http://www.opengis.net/gml
Annotations
A tin is a triangulated surface that uses the Delauny algorithm or a similar algorithm complemented with consideration of breaklines, stoplines, and maximum length of triangle sides. These networks satisfy the Delauny's criterion away from the modifications: Fore each triangle in the network, the circle passing through its vertices does not contain, in its interior, the vertex of any other triangle.
Diagram
Diagram index2.tmp#id763 index2.tmp#id729 index2.tmp#id729 index2.tmp#id749 index2.tmp#id749 index2.tmp#id751 index2.tmp#id751 index2.tmp#id728 index2.tmp#id727 index6.tmp#id764 index6.tmp#id765 index6.tmp#id726 index6.tmp#id725 index32.tmp#id803 index5.tmp#id1726 index5.tmp#id1725 index2.tmp#id729 index2.tmp#id729 index2.tmp#id749 index2.tmp#id749 index2.tmp#id751 index2.tmp#id751 index2.tmp#id728 index5.tmp#id1728 index5.tmp#id1770 index5.tmp#id1772 index5.tmp#id1774 index5.tmp#id1775 index5.tmp#id1776
Type extension of gml:TriangulatedSurfaceType
Type hierarchy
Used by
Element gml:Tin
Model gml:metaDataProperty* , gml:description{0,1} , gml:name* , gml:trianglePatches , gml:stopLines* , gml:breakLines* , gml:maxLength , gml:controlPoint
Children gml:breakLines, gml:controlPoint, gml:description, gml:maxLength, gml:metaDataProperty, gml:name, gml:stopLines, gml:trianglePatches
Attributes
QName Type Fixed Default Use Annotation
axisLabels gml:NCNameList optional
Ordered list of labels for all the axes of this CRS. The gml:axisAbbrev value should be used for these axis labels, after spaces and forbiddden characters are removed. When the srsName attribute is included, this attribute is optional. When the srsName attribute is omitted, this attribute shall also be omitted.
gid string optional
This attribute is included for backward compatibility with GML 2 and is deprecated with GML 3. This identifer is superceded by "gml:id" inherited from AbstractGMLType. The attribute "gid" should not be used anymore and may be deleted in future versions of GML without further notice.
gml:id ID optional
Database handle for the object. It is of XML type ID, so is constrained to be unique in the XML document within which it occurs. An external identifier for the object in the form of a URI may be constructed using standard XML and XPointer methods. This is done by concatenating the URI for the document, a fragment separator, and the value of the id attribute.
srsDimension positiveInteger optional
The "srsDimension" is the length of coordinate sequence (the number of entries in the list). This dimension is specified by the coordinate reference system. When the srsName attribute is omitted, this attribute shall be omitted.
srsName anyURI optional
In general this reference points to a CRS instance of gml:CoordinateReferenceSystemType (see coordinateReferenceSystems.xsd). For well known references it is not required that the CRS description exists at the location the URI points to. If no srsName attribute is given, the CRS must be specified as part of the larger context this geometry element is part of, e.g. a geometric element like point, curve, etc. It is expected that this attribute will be specified at the direct position level only in rare cases.
uomLabels gml:NCNameList optional
Ordered list of unit of measure (uom) labels for all the axes of this CRS. The value of the string in the gml:catalogSymbol should be used for this uom labels, after spaces and forbiddden characters are removed. When the axisLabels attribute is included, this attribute shall also be included. When the axisLabels attribute is omitted, this attribute shall also be omitted.
Source
<complexType name="TinType">
  <annotation>
    <documentation>A tin is a triangulated surface that uses
   the Delauny algorithm or a similar algorithm complemented with
   consideration of breaklines, stoplines, and maximum length of 
   triangle sides. These networks satisfy the Delauny's criterion
   away from the modifications: Fore each triangle in the 
   network, the circle passing through its vertices does not
   contain, in its interior, the vertex of any other triangle.</documentation>
  </annotation>
  <complexContent>
    <extension base="gml:TriangulatedSurfaceType">
      <sequence>
        <element name="stopLines" type="gml:LineStringSegmentArrayPropertyType" minOccurs="0" maxOccurs="unbounded">
          <annotation>
            <documentation>Stoplines are lines where the local
       continuity or regularity of the surface is questionable.
       In the area of these pathologies, triangles intersecting
       a stopline shall be removed from the tin surface, leaving
       holes in the surface. If coincidence occurs on surface
       boundary triangles, the result shall be a change of the 
       surface boundary. Stoplines contains all these
       pathological segments as a set of line strings.</documentation>
          </annotation>
        </element>
        <element name="breakLines" type="gml:LineStringSegmentArrayPropertyType" minOccurs="0" maxOccurs="unbounded">
          <annotation>
            <documentation>Breaklines are lines of a critical
       nature to the shape of the surface, representing local
       ridges, or depressions (such as drainage lines) in the
       surface. As such their constituent segments must be
       included in the tin eve if doing so
       violates the Delauny criterion. Break lines contains these
       critical segments as a set of line strings.</documentation>
          </annotation>
        </element>
        <element name="maxLength" type="gml:LengthType">
          <annotation>
            <documentation>Areas of the surface where data is not 
       sufficiently dense to assure reasonable calculation shall be    
       removed by adding a retention criterion for triangles based 
       on the length of their sides. For many triangle sides  
       exceeding maximum length, the adjacent triangles to that 
       triangle side shall be removed from the surface.</documentation>
          </annotation>
        </element>
        <element name="controlPoint">
          <annotation>
            <documentation>The corners of the triangles in the TIN 
  are often referred to as pots. ControlPoint shall contain a 
  set of the GM_Position used as posts for this TIN. Since each  
  TIN contains triangles, there must be at least 3 posts. The 
       order in which these points are given does not affect the 
       surface that is represented. Application schemas may add 
       information based on ordering of control points to facilitate 
       the reconstruction of the TIN from the control points.</documentation>
          </annotation>
          <complexType>
            <choice>
              <element ref="gml:posList"/>
              <group ref="gml:geometricPositionGroup" minOccurs="3" maxOccurs="unbounded"/>
            </choice>
          </complexType>
        </element>
      </sequence>
    </extension>
  </complexContent>
</complexType>
Complex Type gml:LineStringSegmentArrayPropertyType
Namespace http://www.opengis.net/gml
Diagram
Diagram index5.tmp#id1636
Used by
Model gml:LineStringSegment*
Children gml:LineStringSegment
Source
<complexType name="LineStringSegmentArrayPropertyType">
  <sequence>
    <element ref="gml:LineStringSegment" minOccurs="0" maxOccurs="unbounded"/>
  </sequence>
</complexType>
Complex Type gml:SolidType
Namespace http://www.opengis.net/gml
Annotations
A solid is the basis for 3-dimensional geometry. The extent of a solid is defined by the boundary surfaces (shells). A shell is represented by a composite surface, where every shell is used to represent a single connected component of the boundary of a solid. It consists of a composite surface (a list of orientable surfaces) connected in a topological cycle (an object whose boundary is empty). Unlike a Ring, a Shell's elements have no natural sort order. Like Rings, Shells are simple.
Diagram
Diagram index2.tmp#id763 index2.tmp#id729 index2.tmp#id749 index2.tmp#id751 index2.tmp#id728 index2.tmp#id727 index6.tmp#id764 index6.tmp#id765 index6.tmp#id726 index6.tmp#id725 index5.tmp#id1593 index5.tmp#id1780 index5.tmp#id1781
Type extension of gml:AbstractSolidType
Type hierarchy
Used by
Element gml:Solid
Model gml:metaDataProperty* , gml:description{0,1} , gml:name* , gml:exterior{0,1} , gml:interior*
Children gml:description, gml:exterior, gml:interior, gml:metaDataProperty, gml:name
Attributes
QName Type Fixed Default Use Annotation
axisLabels gml:NCNameList optional
Ordered list of labels for all the axes of this CRS. The gml:axisAbbrev value should be used for these axis labels, after spaces and forbiddden characters are removed. When the srsName attribute is included, this attribute is optional. When the srsName attribute is omitted, this attribute shall also be omitted.
gid string optional
This attribute is included for backward compatibility with GML 2 and is deprecated with GML 3. This identifer is superceded by "gml:id" inherited from AbstractGMLType. The attribute "gid" should not be used anymore and may be deleted in future versions of GML without further notice.
gml:id ID optional
Database handle for the object. It is of XML type ID, so is constrained to be unique in the XML document within which it occurs. An external identifier for the object in the form of a URI may be constructed using standard XML and XPointer methods. This is done by concatenating the URI for the document, a fragment separator, and the value of the id attribute.
srsDimension positiveInteger optional
The "srsDimension" is the length of coordinate sequence (the number of entries in the list). This dimension is specified by the coordinate reference system. When the srsName attribute is omitted, this attribute shall be omitted.
srsName anyURI optional
In general this reference points to a CRS instance of gml:CoordinateReferenceSystemType (see coordinateReferenceSystems.xsd). For well known references it is not required that the CRS description exists at the location the URI points to. If no srsName attribute is given, the CRS must be specified as part of the larger context this geometry element is part of, e.g. a geometric element like point, curve, etc. It is expected that this attribute will be specified at the direct position level only in rare cases.
uomLabels gml:NCNameList optional
Ordered list of unit of measure (uom) labels for all the axes of this CRS. The value of the string in the gml:catalogSymbol should be used for this uom labels, after spaces and forbiddden characters are removed. When the axisLabels attribute is included, this attribute shall also be included. When the axisLabels attribute is omitted, this attribute shall also be omitted.
Source
<complexType name="SolidType">
  <annotation>
    <documentation>A solid is the basis for 3-dimensional geometry. The extent of a solid is defined by the boundary surfaces (shells). A shell is represented by a composite surface, where every  shell is used to represent a single connected component of the boundary of a solid. It consists of a composite surface (a list of orientable surfaces) connected in a topological cycle (an object whose boundary is empty). Unlike a Ring, a Shell's elements have no natural sort order. Like Rings, Shells are simple.</documentation>
  </annotation>
  <complexContent>
    <extension base="gml:AbstractSolidType">
      <sequence>
        <element name="exterior" type="gml:SurfacePropertyType" minOccurs="0">
          <annotation>
            <appinfo>
              <sch:pattern name="Check either href or content not both">
                <sch:rule context="gml:exterior">
                  <sch:extends rule="hrefOrContent"/>
                </sch:rule>
              </sch:pattern>
            </appinfo>
            <documentation>Boundaries of solids are similar to surface boundaries. In normal 3-dimensional Euclidean space, one (composite) surface is distinguished as the exterior. In the more general case, this is not always possible.</documentation>
          </annotation>
        </element>
        <element name="interior" type="gml:SurfacePropertyType" minOccurs="0" maxOccurs="unbounded">
          <annotation>
            <appinfo>
              <sch:pattern name="Check either href or content not both">
                <sch:rule context="gml:interior">
                  <sch:extends rule="hrefOrContent"/>
                </sch:rule>
              </sch:pattern>
            </appinfo>
            <documentation>Boundaries of solids are similar to surface boundaries.</documentation>
          </annotation>
        </element>
      </sequence>
    </extension>
  </complexContent>
</complexType>
Attribute gml:AbstractCurveSegmentType / @numDerivativesAtStart
Namespace No namespace
Annotations
The attribute "numDerivativesAtStart" specifies the type of continuity between this curve segment and its predecessor. If this is the first curve segment in the curve, one of these values, as appropriate, is ignored. The default value of "0" means simple continuity, which is a mandatory minimum level of continuity. This level is referred to as "C 0 " in mathematical texts. A value of 1 means that the function and its first derivative are continuous at the appropriate end point: "C 1 " continuity. A value of "n" for any integer means the function and its first n derivatives are continuous: "C n " continuity. NOTE: Use of these values is only appropriate when the basic curve definition is an underdetermined system. For example, line string segments cannot support continuity above C 0 , since there is no spare control parameter to adjust the incoming angle at the end points of the segment. Spline functions on the other hand often have extra degrees of freedom on end segments that allow them to adjust the values of the derivatives to support C 1 or higher continuity.
Type integer
Properties
use: optional
default: 0
Used by
Source
<attribute name="numDerivativesAtStart" type="integer" use="optional" default="0">
  <annotation>
    <documentation>The attribute "numDerivativesAtStart" specifies the type of continuity between this curve segment and its predecessor. If this is the first curve segment in the curve, one of these values, as appropriate, is ignored. The default value of "0" means simple continuity, which is a mandatory minimum level of continuity. This level is referred to as "C 0 " in mathematical texts. A value of 1 means that the function and its first derivative are continuous at the appropriate end point: "C 1 " continuity. A value of "n" for any integer means the function and its first n derivatives are continuous: "C n " continuity.
NOTE: Use of these values is only appropriate when the basic curve definition is an underdetermined system. For example, line string segments cannot support continuity above C 0 , since there is no spare control parameter to adjust the incoming angle at the end points of the segment. Spline functions on the other hand often have extra degrees of freedom on end segments that allow them to adjust the values of the derivatives to support C 1 or higher continuity.</documentation>
  </annotation>
</attribute>
Attribute gml:AbstractCurveSegmentType / @numDerivativesAtEnd
Namespace No namespace
Annotations
The attribute "numDerivativesAtEnd" specifies the type of continuity between this curve segment and its successor. If this is the last curve segment in the curve, one of these values, as appropriate, is ignored. The default value of "0" means simple continuity, which is a mandatory minimum level of continuity. This level is referred to as "C 0 " in mathematical texts. A value of 1 means that the function and its first derivative are continuous at the appropriate end point: "C 1 " continuity. A value of "n" for any integer means the function and its first n derivatives are continuous: "C n " continuity. NOTE: Use of these values is only appropriate when the basic curve definition is an underdetermined system. For example, line string segments cannot support continuity above C 0 , since there is no spare control parameter to adjust the incoming angle at the end points of the segment. Spline functions on the other hand often have extra degrees of freedom on end segments that allow them to adjust the values of the derivatives to support C 1 or higher continuity.
Type integer
Properties
use: optional
default: 0
Used by
Source
<attribute name="numDerivativesAtEnd" type="integer" use="optional" default="0">
  <annotation>
    <documentation>The attribute "numDerivativesAtEnd" specifies the type of continuity between this curve segment and its successor. If this is the last curve segment in the curve, one of these values, as appropriate, is ignored. The default value of "0" means simple continuity, which is a mandatory minimum level of continuity. This level is referred to as "C 0 " in mathematical texts. A value of 1 means that the function and its first derivative are continuous at the appropriate end point: "C 1 " continuity. A value of "n" for any integer means the function and its first n derivatives are continuous: "C n " continuity.
NOTE: Use of these values is only appropriate when the basic curve definition is an underdetermined system. For example, line string segments cannot support continuity above C 0 , since there is no spare control parameter to adjust the incoming angle at the end points of the segment. Spline functions on the other hand often have extra degrees of freedom on end segments that allow them to adjust the values of the derivatives to support C 1 or higher continuity.</documentation>
  </annotation>
</attribute>
Attribute gml:AbstractCurveSegmentType / @numDerivativeInterior
Namespace No namespace
Annotations
The attribute "numDerivativesInterior" specifies the type of continuity that is guaranteed interior to the curve. The default value of "0" means simple continuity, which is a mandatory minimum level of continuity. This level is referred to as "C 0 " in mathematical texts. A value of 1 means that the function and its first derivative are continuous at the appropriate end point: "C 1 " continuity. A value of "n" for any integer means the function and its first n derivatives are continuous: "C n " continuity. NOTE: Use of these values is only appropriate when the basic curve definition is an underdetermined system. For example, line string segments cannot support continuity above C 0 , since there is no spare control parameter to adjust the incoming angle at the end points of the segment. Spline functions on the other hand often have extra degrees of freedom on end segments that allow them to adjust the values of the derivatives to support C 1 or higher continuity.
Type integer
Properties
use: optional
default: 0
Used by
Source
<attribute name="numDerivativeInterior" type="integer" use="optional" default="0">
  <annotation>
    <documentation>The attribute "numDerivativesInterior" specifies the type of continuity that is guaranteed interior to the curve. The default value of "0" means simple continuity, which is a mandatory minimum level of continuity. This level is referred to as "C 0 " in mathematical texts. A value of 1 means that the function and its first derivative are continuous at the appropriate end point: "C 1 " continuity. A value of "n" for any integer means the function and its first n derivatives are continuous: "C n " continuity.
NOTE: Use of these values is only appropriate when the basic curve definition is an underdetermined system. For example, line string segments cannot support continuity above C 0 , since there is no spare control parameter to adjust the incoming angle at the end points of the segment. Spline functions on the other hand often have extra degrees of freedom on end segments that allow them to adjust the values of the derivatives to support C 1 or higher continuity.</documentation>
  </annotation>
</attribute>
Attribute gml:OrientableCurveType / @orientation
Namespace No namespace
Annotations
If the orientation is "+", then the OrientableCurve is identical to the baseCurve. If the orientation is "-", then the OrientableCurve is related to another _Curve with a parameterization that reverses the sense of the curve traversal. "+" is the default value.
Type gml:SignType
Properties
default: +
Facets
enumeration -
enumeration +
Used by
Source
<attribute name="orientation" type="gml:SignType" default="+">
  <annotation>
    <documentation>If the orientation is "+", then the OrientableCurve is identical to the baseCurve. If the orientation is "-", then the OrientableCurve is related to another _Curve with a parameterization that reverses the sense of the curve traversal. "+" is the default value.</documentation>
  </annotation>
</attribute>
Attribute gml:LineStringSegmentType / @interpolation
Namespace No namespace
Annotations
The attribute "interpolation" specifies the curve interpolation mechanism used for this segment. This mechanism uses the control points and control parameters to determine the position of this curve segment. For a LineStringSegment the interpolation is fixed as "linear".
Type gml:CurveInterpolationType
Properties
fixed: linear
Facets
enumeration linear
enumeration geodesic
enumeration circularArc3Points
enumeration circularArc2PointWithBulge
enumeration circularArcCenterPointWithRadius
enumeration elliptical
enumeration clothoid
enumeration conic
enumeration polynomialSpline
enumeration cubicSpline
enumeration rationalSpline
Used by
Source
<attribute name="interpolation" type="gml:CurveInterpolationType" fixed="linear">
  <annotation>
    <documentation>The attribute "interpolation" specifies the curve interpolation mechanism used for this segment. This mechanism
uses the control points and control parameters to determine the position of this curve segment. For a LineStringSegment the interpolation is fixed as "linear".</documentation>
  </annotation>
</attribute>
Attribute gml:ArcStringType / @interpolation
Namespace No namespace
Annotations
The attribute "interpolation" specifies the curve interpolation mechanism used for this segment. This mechanism uses the control points and control parameters to determine the position of this curve segment. For an ArcString the interpolation is fixed as "circularArc3Points".
Type gml:CurveInterpolationType
Properties
fixed: circularArc3Points
Facets
enumeration linear
enumeration geodesic
enumeration circularArc3Points
enumeration circularArc2PointWithBulge
enumeration circularArcCenterPointWithRadius
enumeration elliptical
enumeration clothoid
enumeration conic
enumeration polynomialSpline
enumeration cubicSpline
enumeration rationalSpline
Used by
Complex Type gml:ArcStringType
Source
<attribute name="interpolation" type="gml:CurveInterpolationType" fixed="circularArc3Points">
  <annotation>
    <documentation>The attribute "interpolation" specifies the curve interpolation mechanism used for this segment. This mechanism
uses the control points and control parameters to determine the position of this curve segment. For an ArcString the interpolation is fixed as "circularArc3Points".</documentation>
  </annotation>
</attribute>
Attribute gml:ArcStringType / @numArc
Namespace No namespace
Annotations
The number of arcs in the arc string can be explicitly stated in this attribute. The number of control points in the arc string must be 2 * numArc + 1.
Type integer
Properties
use: optional
Used by
Complex Type gml:ArcStringType
Source
<attribute name="numArc" type="integer" use="optional">
  <annotation>
    <documentation>The number of arcs in the arc string can be explicitly stated in this attribute. The number of control points in the arc string must be 2 * numArc + 1.</documentation>
  </annotation>
</attribute>
Attribute gml:ArcType / @numArc
Namespace No namespace
Annotations
An arc is an arc string consiting of a single arc, the attribute is fixed to "1".
Type integer
Properties
use: optional
fixed: 1
Used by
Complex Type gml:ArcType
Source
<attribute name="numArc" type="integer" use="optional" fixed="1">
  <annotation>
    <documentation>An arc is an arc string consiting of a single arc, the attribute is fixed to "1".</documentation>
  </annotation>
</attribute>
Attribute gml:ArcStringByBulgeType / @interpolation
Namespace No namespace
Annotations
The attribute "interpolation" specifies the curve interpolation mechanism used for this segment. This mechanism uses the control points and control parameters to determine the position of this curve segment. For an ArcStringByBulge the interpolation is fixed as "circularArc2PointWithBulge".
Type gml:CurveInterpolationType
Properties
fixed: circularArc2PointWithBulge
Facets
enumeration linear
enumeration geodesic
enumeration circularArc3Points
enumeration circularArc2PointWithBulge
enumeration circularArcCenterPointWithRadius
enumeration elliptical
enumeration clothoid
enumeration conic
enumeration polynomialSpline
enumeration cubicSpline
enumeration rationalSpline
Used by
Source
<attribute name="interpolation" type="gml:CurveInterpolationType" fixed="circularArc2PointWithBulge">
  <annotation>
    <documentation>The attribute "interpolation" specifies the curve interpolation mechanism used for this segment. This mechanism
uses the control points and control parameters to determine the position of this curve segment. For an ArcStringByBulge the interpolation is fixed as "circularArc2PointWithBulge".</documentation>
  </annotation>
</attribute>
Attribute gml:ArcStringByBulgeType / @numArc
Namespace No namespace
Annotations
The number of arcs in the arc string can be explicitly stated in this attribute. The number of control points in the arc string must be numArc + 1.
Type integer
Properties
use: optional
Used by
Source
<attribute name="numArc" type="integer" use="optional">
  <annotation>
    <documentation>The number of arcs in the arc string can be explicitly stated in this attribute. The number of control points in the arc string must be numArc + 1.</documentation>
  </annotation>
</attribute>
Attribute gml:ArcByBulgeType / @numArc
Namespace No namespace
Annotations
An arc is an arc string consiting of a single arc, the attribute is fixed to "1".
Type integer
Properties
use: optional
fixed: 1
Used by
Complex Type gml:ArcByBulgeType
Source
<attribute name="numArc" type="integer" use="optional" fixed="1">
  <annotation>
    <documentation>An arc is an arc string consiting of a single arc, the attribute is fixed to "1".</documentation>
  </annotation>
</attribute>
Attribute gml:ArcByCenterPointType / @interpolation
Namespace No namespace
Annotations
The attribute "interpolation" specifies the curve interpolation mechanism used for this segment. This mechanism uses the control points and control parameters to determine the position of this curve segment. For an ArcByCenterPoint the interpolation is fixed as "circularArcCenterPointWithRadius".
Type gml:CurveInterpolationType
Properties
fixed: circularArcCenterPointWithRadius
Facets
enumeration linear
enumeration geodesic
enumeration circularArc3Points
enumeration circularArc2PointWithBulge
enumeration circularArcCenterPointWithRadius
enumeration elliptical
enumeration clothoid
enumeration conic
enumeration polynomialSpline
enumeration cubicSpline
enumeration rationalSpline
Used by
Source
<attribute name="interpolation" type="gml:CurveInterpolationType" fixed="circularArcCenterPointWithRadius">
  <annotation>
    <documentation>The attribute "interpolation" specifies the curve interpolation mechanism used for this segment. This mechanism
uses the control points and control parameters to determine the position of this curve segment. For an ArcByCenterPoint the interpolation is fixed as "circularArcCenterPointWithRadius".</documentation>
  </annotation>
</attribute>
Attribute gml:ArcByCenterPointType / @numArc
Namespace No namespace
Annotations
Since this type describes always a single arc, the attribute is fixed to "1".
Type integer
Properties
use: required
fixed: 1
Used by
Source
<attribute name="numArc" type="integer" use="required" fixed="1">
  <annotation>
    <documentation>Since this type describes always a single arc, the attribute is fixed to "1".</documentation>
  </annotation>
</attribute>
Attribute gml:GeodesicStringType / @interpolation
Namespace No namespace
Annotations
The attribute "interpolation" specifies the curve interpolation mechanism used for this segment. This mechanism uses the control points and control parameters to determine the position of this curve segment. For an GeodesicString the interpolation is fixed as "geodesic".
Type gml:CurveInterpolationType
Properties
fixed: geodesic
Facets
enumeration linear
enumeration geodesic
enumeration circularArc3Points
enumeration circularArc2PointWithBulge
enumeration circularArcCenterPointWithRadius
enumeration elliptical
enumeration clothoid
enumeration conic
enumeration polynomialSpline
enumeration cubicSpline
enumeration rationalSpline
Used by
Complex Type gml:GeodesicStringType
Source
<attribute name="interpolation" type="gml:CurveInterpolationType" fixed="geodesic">
  <annotation>
    <documentation>The attribute "interpolation" specifies the
     curve interpolation mechanism used for this segment. This
     mechanism uses the control points and control parameters to
     determine the position of this curve segment. For an 
     GeodesicString the interpolation is fixed as "geodesic".</documentation>
  </annotation>
</attribute>
Attribute gml:CubicSplineType / @interpolation
Namespace No namespace
Annotations
The attribute "interpolation" specifies the curve interpolation mechanism used for this segment. This mechanism uses the control points and control parameters to determine the position of this curve segment. For a CubicSpline the interpolation is fixed as "cubicSpline".
Type gml:CurveInterpolationType
Properties
fixed: cubicSpline
Facets
enumeration linear
enumeration geodesic
enumeration circularArc3Points
enumeration circularArc2PointWithBulge
enumeration circularArcCenterPointWithRadius
enumeration elliptical
enumeration clothoid
enumeration conic
enumeration polynomialSpline
enumeration cubicSpline
enumeration rationalSpline
Used by
Complex Type gml:CubicSplineType
Source
<attribute name="interpolation" type="gml:CurveInterpolationType" fixed="cubicSpline">
  <annotation>
    <documentation>The attribute "interpolation" specifies the curve interpolation mechanism used for this segment. This mechanism
uses the control points and control parameters to determine the position of this curve segment. For a CubicSpline the interpolation is fixed as "cubicSpline".</documentation>
  </annotation>
</attribute>
Attribute gml:CubicSplineType / @degree
Namespace No namespace
Annotations
The degree for a cubic spline is "3".
Type integer
Properties
fixed: 3
Used by
Complex Type gml:CubicSplineType
Source
<attribute name="degree" type="integer" fixed="3">
  <annotation>
    <documentation>The degree for a cubic spline is "3".</documentation>
  </annotation>
</attribute>
Attribute gml:BSplineType / @interpolation
Namespace No namespace
Annotations
The attribute "interpolation" specifies the curve interpolation mechanism used for this segment. This mechanism uses the control points and control parameters to determine the position of this curve segment. For a BSpline the interpolation can be either "polynomialSpline" or "rationalSpline", default is "polynomialSpline".
Type gml:CurveInterpolationType
Properties
default: polynomialSpline
Facets
enumeration linear
enumeration geodesic
enumeration circularArc3Points
enumeration circularArc2PointWithBulge
enumeration circularArcCenterPointWithRadius
enumeration elliptical
enumeration clothoid
enumeration conic
enumeration polynomialSpline
enumeration cubicSpline
enumeration rationalSpline
Used by
Complex Type gml:BSplineType
Source
<attribute name="interpolation" type="gml:CurveInterpolationType" default="polynomialSpline">
  <annotation>
    <documentation>The attribute "interpolation" specifies the curve interpolation mechanism used for this segment. This mechanism
uses the control points and control parameters to determine the position of this curve segment. For a BSpline the interpolation can be either "polynomialSpline" or "rationalSpline", default is "polynomialSpline".</documentation>
  </annotation>
</attribute>
Attribute gml:BSplineType / @isPolynomial
Namespace No namespace
Annotations
The attribute isPolynomial is set to true if this is a polynomial spline.
Type boolean
Properties
use: optional
Used by
Complex Type gml:BSplineType
Source
<attribute name="isPolynomial" type="boolean" use="optional">
  <annotation>
    <documentation>The attribute isPolynomial is set to true if this is a polynomial spline.</documentation>
  </annotation>
</attribute>
Attribute gml:BSplineType / @knotType
Namespace No namespace
Annotations
The attribute "knotType" gives the type of knot distribution used in defining this spline. This is for information only and is set according to the different construction-functions.
Type gml:KnotTypesType
Properties
use: optional
Facets
enumeration uniform
enumeration quasiUniform
enumeration piecewiseBezier
Used by
Complex Type gml:BSplineType
Source
<attribute name="knotType" type="gml:KnotTypesType" use="optional">
  <annotation>
    <documentation>The attribute "knotType" gives the type of knot distribution used in defining this spline. This is for information only
and is set according to the different construction-functions.</documentation>
  </annotation>
</attribute>
Attribute gml:BezierType / @interpolation
Namespace No namespace
Annotations
The attribute "interpolation" specifies the curve interpolation mechanism used for this segment. This mechanism uses the control points and control parameters to determine the position of this curve segment. For a Bezier the interpolation is fixed as "polynomialSpline".
Type gml:CurveInterpolationType
Properties
fixed: polynomialSpline
Facets
enumeration linear
enumeration geodesic
enumeration circularArc3Points
enumeration circularArc2PointWithBulge
enumeration circularArcCenterPointWithRadius
enumeration elliptical
enumeration clothoid
enumeration conic
enumeration polynomialSpline
enumeration cubicSpline
enumeration rationalSpline
Used by
Complex Type gml:BezierType
Source
<attribute name="interpolation" type="gml:CurveInterpolationType" fixed="polynomialSpline">
  <annotation>
    <documentation>The attribute "interpolation" specifies the curve interpolation mechanism used for this segment. This mechanism
uses the control points and control parameters to determine the position of this curve segment. For a Bezier the interpolation is fixed as "polynomialSpline".</documentation>
  </annotation>
</attribute>
Attribute gml:BezierType / @isPolynomial
Namespace No namespace
Annotations
The attribute isPolynomial is set to true as this is a polynomial spline.
Type boolean
Properties
fixed: true
Used by
Complex Type gml:BezierType
Source
<attribute name="isPolynomial" type="boolean" fixed="true">
  <annotation>
    <documentation>The attribute isPolynomial is set to true as this is a polynomial spline.</documentation>
  </annotation>
</attribute>
Attribute gml:BezierType / @knotType
Namespace No namespace
Annotations
The property "knotType" is not relevant for Bezier curve segments.
Type gml:KnotTypesType
Properties
use: prohibited
Facets
enumeration uniform
enumeration quasiUniform
enumeration piecewiseBezier
Used by
Complex Type gml:BezierType
Source
<attribute name="knotType" type="gml:KnotTypesType" use="prohibited">
  <annotation>
    <documentation>The property "knotType" is not relevant for Bezier curve segments.</documentation>
  </annotation>
</attribute>
Attribute gml:OrientableSurfaceType / @orientation
Namespace No namespace
Annotations
If the orientation is "+", then the OrientableSurface is identical to the baseSurface. If the orientation is "-", then the OrientableSurface is a reference to a Surface with an up-normal that reverses the direction for this OrientableSurface, the sense of "the top of the surface". "+" is the default value.
Type gml:SignType
Properties
default: +
Facets
enumeration -
enumeration +
Used by
Source
<attribute name="orientation" type="gml:SignType" default="+">
  <annotation>
    <documentation>If the orientation is "+", then the OrientableSurface is identical to the baseSurface. If the orientation is "-", then the OrientableSurface is a reference to a Surface with an up-normal that reverses the direction for this OrientableSurface, the sense of "the top of the surface". "+" is the default value.</documentation>
  </annotation>
</attribute>
Attribute gml:PolygonPatchType / @interpolation
Namespace No namespace
Annotations
The attribute "interpolation" specifies the interpolation mechanism used for this surface patch. Currently only planar surface patches are defined in GML 3, the attribute is fixed to "planar", i.e. the interpolation method shall return points on a single plane. The boundary of the patch shall be contained within that plane.
Type gml:SurfaceInterpolationType
Properties
fixed: planar
Facets
enumeration none
enumeration planar
enumeration spherical
enumeration elliptical
enumeration conic
enumeration tin
enumeration parametricCurve
enumeration polynomialSpline
enumeration rationalSpline
enumeration triangulatedSpline
Used by
Complex Type gml:PolygonPatchType
Source
<attribute name="interpolation" type="gml:SurfaceInterpolationType" fixed="planar">
  <annotation>
    <documentation>The attribute "interpolation" specifies the interpolation mechanism used for this surface patch. Currently only planar surface patches are defined in GML 3, the attribute is fixed to "planar", i.e. the interpolation method shall return points on a single plane. The boundary of the patch shall be contained within that plane.</documentation>
  </annotation>
</attribute>
Attribute gml:TriangleType / @interpolation
Namespace No namespace
Annotations
The attribute "interpolation" specifies the interpolation mechanism used for this surface patch. Currently only planar surface patches are defined in GML 3, the attribute is fixed to "planar", i.e. the interpolation method shall return points on a single plane. The boundary of the patch shall be contained within that plane.
Type gml:SurfaceInterpolationType
Properties
fixed: planar
Facets
enumeration none
enumeration planar
enumeration spherical
enumeration elliptical
enumeration conic
enumeration tin
enumeration parametricCurve
enumeration polynomialSpline
enumeration rationalSpline
enumeration triangulatedSpline
Used by
Complex Type gml:TriangleType
Source
<attribute name="interpolation" type="gml:SurfaceInterpolationType" fixed="planar">
  <annotation>
    <documentation>The attribute "interpolation" specifies the interpolation mechanism used for this surface patch. Currently only planar surface patches are defined in GML 3, the attribute is fixed to "planar", i.e. the interpolation method shall return points on a single plane. The boundary of the patch shall be contained within that plane.</documentation>
  </annotation>
</attribute>
Attribute gml:RectangleType / @interpolation
Namespace No namespace
Annotations
The attribute "interpolation" specifies the interpolation mechanism used for this surface patch. Currently only planar surface patches are defined in GML 3, the attribute is fixed to "planar", i.e. the interpolation method shall return points on a single plane. The boundary of the patch shall be contained within that plane.
Type gml:SurfaceInterpolationType
Properties
fixed: planar
Facets
enumeration none
enumeration planar
enumeration spherical
enumeration elliptical
enumeration conic
enumeration tin
enumeration parametricCurve
enumeration polynomialSpline
enumeration rationalSpline
enumeration triangulatedSpline
Used by
Complex Type gml:RectangleType
Source
<attribute name="interpolation" type="gml:SurfaceInterpolationType" fixed="planar">
  <annotation>
    <documentation>The attribute "interpolation" specifies the interpolation mechanism used for this surface patch. Currently only planar surface patches are defined in GML 3, the attribute is fixed to "planar", i.e. the interpolation method shall return points on a single plane. The boundary of the patch shall be contained within that plane.</documentation>
  </annotation>
</attribute>
Attribute gml:ConeType / @horizontalCurveType
Namespace No namespace
Type gml:CurveInterpolationType
Properties
fixed: circularArc3Points
Facets
enumeration linear
enumeration geodesic
enumeration circularArc3Points
enumeration circularArc2PointWithBulge
enumeration circularArcCenterPointWithRadius
enumeration elliptical
enumeration clothoid
enumeration conic
enumeration polynomialSpline
enumeration cubicSpline
enumeration rationalSpline
Used by
Complex Type gml:ConeType
Source
<attribute name="horizontalCurveType" type="gml:CurveInterpolationType" fixed="circularArc3Points"/>
Attribute gml:ConeType / @verticalCurveType
Namespace No namespace
Type gml:CurveInterpolationType
Properties
fixed: linear
Facets
enumeration linear
enumeration geodesic
enumeration circularArc3Points
enumeration circularArc2PointWithBulge
enumeration circularArcCenterPointWithRadius
enumeration elliptical
enumeration clothoid
enumeration conic
enumeration polynomialSpline
enumeration cubicSpline
enumeration rationalSpline
Used by
Complex Type gml:ConeType
Source
<attribute name="verticalCurveType" type="gml:CurveInterpolationType" fixed="linear"/>
Attribute gml:CylinderType / @horizontalCurveType
Namespace No namespace
Type gml:CurveInterpolationType
Properties
fixed: circularArc3Points
Facets
enumeration linear
enumeration geodesic
enumeration circularArc3Points
enumeration circularArc2PointWithBulge
enumeration circularArcCenterPointWithRadius
enumeration elliptical
enumeration clothoid
enumeration conic
enumeration polynomialSpline
enumeration cubicSpline
enumeration rationalSpline
Used by
Complex Type gml:CylinderType
Source
<attribute name="horizontalCurveType" type="gml:CurveInterpolationType" fixed="circularArc3Points"/>
Attribute gml:CylinderType / @verticalCurveType
Namespace No namespace
Type gml:CurveInterpolationType
Properties
fixed: linear
Facets
enumeration linear
enumeration geodesic
enumeration circularArc3Points
enumeration circularArc2PointWithBulge
enumeration circularArcCenterPointWithRadius
enumeration elliptical
enumeration clothoid
enumeration conic
enumeration polynomialSpline
enumeration cubicSpline
enumeration rationalSpline
Used by
Complex Type gml:CylinderType
Source
<attribute name="verticalCurveType" type="gml:CurveInterpolationType" fixed="linear"/>
Attribute gml:SphereType / @horizontalCurveType
Namespace No namespace
Type gml:CurveInterpolationType
Properties
fixed: circularArc3Points
Facets
enumeration linear
enumeration geodesic
enumeration circularArc3Points
enumeration circularArc2PointWithBulge
enumeration circularArcCenterPointWithRadius
enumeration elliptical
enumeration clothoid
enumeration conic
enumeration polynomialSpline
enumeration cubicSpline
enumeration rationalSpline
Used by
Complex Type gml:SphereType
Source
<attribute name="horizontalCurveType" type="gml:CurveInterpolationType" fixed="circularArc3Points"/>
Attribute gml:SphereType / @verticalCurveType
Namespace No namespace
Type gml:CurveInterpolationType
Properties
fixed: circularArc3Points
Facets
enumeration linear
enumeration geodesic
enumeration circularArc3Points
enumeration circularArc2PointWithBulge
enumeration circularArcCenterPointWithRadius
enumeration elliptical
enumeration clothoid
enumeration conic
enumeration polynomialSpline
enumeration cubicSpline
enumeration rationalSpline
Used by
Complex Type gml:SphereType
Source
<attribute name="verticalCurveType" type="gml:CurveInterpolationType" fixed="circularArc3Points"/>
Element Group gml:PointGrid
Namespace http://www.opengis.net/gml
Annotations
Reference points which are organised into sequences or grids(sequences of equal length sequences).
Diagram
Diagram index5.tmp#id1751
Used by
Model gml:row+
Children gml:row
Source
<group name="PointGrid">
  <annotation>
    <documentation>Reference points which are organised
   into sequences or grids(sequences of equal length sequences).</documentation>
  </annotation>
  <sequence>
    <element name="row" maxOccurs="unbounded">
      <complexType>
        <sequence>
          <group ref="gml:geometricPositionListGroup"/>
        </sequence>
      </complexType>
    </element>
  </sequence>
</group>