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Annotations
Attributes
Diagrams
Facets
Instances
Properties
Source
Used by
Included schema geometryPrimitives.xsd
Namespace http://standardit.tapio.fi/schemas/workingsitetrade/callforoffer
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 index0.tmp#id456 index15.tmp#id957 index15.tmp#id1658
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 index0.tmp#id488 index0.tmp#id454 index0.tmp#id474 index0.tmp#id476 index0.tmp#id453 index0.tmp#id452 index15.tmp#id489 index15.tmp#id490 index15.tmp#id451 index15.tmp#id450 index18.tmp#id1944 index38.tmp#id1587 index18.tmp#id1586 index15.tmp#id448
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 index0.tmp#id488 index0.tmp#id454 index0.tmp#id474 index0.tmp#id476 index0.tmp#id453 index0.tmp#id452 index15.tmp#id489 index15.tmp#id490 index15.tmp#id451 index15.tmp#id450 index15.tmp#id959 index18.tmp#id1984 index18.tmp#id1983 index15.tmp#id957
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 index18.tmp#id1986 index18.tmp#id1985
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 index18.tmp#id2003 index18.tmp#id2004 index18.tmp#id2005 index18.tmp#id2002 index18.tmp#id1993 index18.tmp#id1988 index18.tmp#id1991 index18.tmp#id2000 index18.tmp#id1996 index18.tmp#id1999 index18.tmp#id1997 index18.tmp#id1987 index18.tmp#id1995
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 index0.tmp#id456 index15.tmp#id957 index15.tmp#id1658
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 index0.tmp#id488 index0.tmp#id454 index0.tmp#id474 index0.tmp#id476 index0.tmp#id453 index0.tmp#id452 index15.tmp#id489 index15.tmp#id490 index15.tmp#id451 index15.tmp#id450 index15.tmp#id959 index18.tmp#id2008 index18.tmp#id2006 index18.tmp#id2007 index15.tmp#id957
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 index18.tmp#id2003 index18.tmp#id2004 index18.tmp#id2005 index18.tmp#id2002 index18.tmp#id2010 index15.tmp#id497 index15.tmp#id445 index15.tmp#id960 index15.tmp#id961 index15.tmp#id500 index18.tmp#id2009 index18.tmp#id1986
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 index18.tmp#id2003 index18.tmp#id2004 index18.tmp#id2005 index18.tmp#id2002 index18.tmp#id2013 index18.tmp#id2014 index15.tmp#id497 index15.tmp#id445 index15.tmp#id960 index15.tmp#id961 index15.tmp#id500 index18.tmp#id2012 index18.tmp#id1989 index18.tmp#id1986
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 index18.tmp#id2003 index18.tmp#id2004 index18.tmp#id2005 index18.tmp#id2002 index18.tmp#id2013 index18.tmp#id2014 index15.tmp#id497 index15.tmp#id445 index15.tmp#id960 index15.tmp#id961 index15.tmp#id500 index18.tmp#id2012 index18.tmp#id2016 index15.tmp#id497 index15.tmp#id445 index15.tmp#id960 index15.tmp#id961 index15.tmp#id500 index18.tmp#id2015 index18.tmp#id1990 index18.tmp#id1988
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 index18.tmp#id2003 index18.tmp#id2004 index18.tmp#id2005 index18.tmp#id2002 index18.tmp#id2013 index18.tmp#id2014 index15.tmp#id497 index15.tmp#id445 index15.tmp#id960 index15.tmp#id961 index15.tmp#id500 index18.tmp#id2012 index18.tmp#id2016 index15.tmp#id497 index15.tmp#id445 index15.tmp#id960 index15.tmp#id961 index15.tmp#id500 index18.tmp#id2015 index18.tmp#id2017 index18.tmp#id1989
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 index18.tmp#id2003 index18.tmp#id2004 index18.tmp#id2005 index18.tmp#id2002 index18.tmp#id2021 index18.tmp#id2022 index15.tmp#id497 index15.tmp#id445 index15.tmp#id960 index15.tmp#id961 index15.tmp#id500 index18.tmp#id2019 index18.tmp#id2020 index18.tmp#id2018 index18.tmp#id1992 index18.tmp#id1986
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 index16.tmp#id499 index15.tmp#id490 index15.tmp#id1601
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 index18.tmp#id2003 index18.tmp#id2004 index18.tmp#id2005 index18.tmp#id2002 index18.tmp#id2021 index18.tmp#id2022 index15.tmp#id497 index15.tmp#id445 index15.tmp#id960 index15.tmp#id961 index15.tmp#id500 index18.tmp#id2019 index18.tmp#id2020 index18.tmp#id2018 index18.tmp#id2026 index15.tmp#id497 index15.tmp#id445 index15.tmp#id960 index15.tmp#id961 index15.tmp#id500 index18.tmp#id2024 index18.tmp#id2025 index18.tmp#id2023 index18.tmp#id1991
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 index16.tmp#id499 index15.tmp#id490 index15.tmp#id1601
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 index18.tmp#id2003 index18.tmp#id2004 index18.tmp#id2005 index18.tmp#id2002 index18.tmp#id2031 index18.tmp#id2032 index15.tmp#id497 index15.tmp#id445 index15.tmp#id960 index15.tmp#id961 index15.tmp#id500 index18.tmp#id2028 index18.tmp#id2029 index18.tmp#id2030 index18.tmp#id2027 index18.tmp#id1994 index18.tmp#id1986
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 index16.tmp#id1595 index16.tmp#id1594 index11.tmp#id1679
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 index16.tmp#id1595 index16.tmp#id1594 index11.tmp#id1603
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 index16.tmp#id1595 index16.tmp#id1594 index11.tmp#id1603
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 index18.tmp#id2003 index18.tmp#id2004 index18.tmp#id2005 index18.tmp#id2002 index18.tmp#id2031 index18.tmp#id2032 index15.tmp#id497 index15.tmp#id445 index15.tmp#id960 index15.tmp#id961 index15.tmp#id500 index18.tmp#id2028 index18.tmp#id2029 index18.tmp#id2030 index18.tmp#id2027 index18.tmp#id2033 index18.tmp#id1993
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 index18.tmp#id2003 index18.tmp#id2004 index18.tmp#id2005 index18.tmp#id2002 index18.tmp#id2035 index18.tmp#id2036 index18.tmp#id2037 index18.tmp#id2034 index18.tmp#id1986
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 index0.tmp#id456 index15.tmp#id957 index15.tmp#id1658
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 index16.tmp#id1595 index16.tmp#id1594 index11.tmp#id1679
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 index16.tmp#id499 index15.tmp#id490 index15.tmp#id1601
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 index18.tmp#id2040 index18.tmp#id2041 index18.tmp#id2042 index18.tmp#id2043 index18.tmp#id2039
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 index16.tmp#id499 index15.tmp#id490 index15.tmp#id498
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 index16.tmp#id499 index15.tmp#id490 index15.tmp#id1601
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 index18.tmp#id2003 index18.tmp#id2004 index18.tmp#id2005 index18.tmp#id2002 index18.tmp#id2045 index18.tmp#id2046 index18.tmp#id2047 index18.tmp#id2048 index18.tmp#id2044 index18.tmp#id1986
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 index18.tmp#id2038
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 index18.tmp#id2003 index18.tmp#id2004 index18.tmp#id2005 index18.tmp#id2002 index18.tmp#id2050 index15.tmp#id961 index15.tmp#id497 index15.tmp#id445 index15.tmp#id1676 index18.tmp#id2049 index18.tmp#id1998 index18.tmp#id1986
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 index18.tmp#id2003 index18.tmp#id2004 index18.tmp#id2005 index18.tmp#id2002 index18.tmp#id2050 index15.tmp#id961 index15.tmp#id497 index15.tmp#id445 index15.tmp#id1676 index18.tmp#id2049 index18.tmp#id2051 index18.tmp#id1997
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 index18.tmp#id2003 index18.tmp#id2004 index18.tmp#id2005 index18.tmp#id2002 index18.tmp#id2055 index18.tmp#id2056 index15.tmp#id497 index15.tmp#id445 index15.tmp#id960 index15.tmp#id961 index15.tmp#id500 index18.tmp#id2053 index18.tmp#id2054 index18.tmp#id2052 index18.tmp#id1986
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 index16.tmp#id499 index15.tmp#id490 index15.tmp#id1601
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 index16.tmp#id499 index15.tmp#id490 index15.tmp#id1601
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 index18.tmp#id2058 index18.tmp#id2059 index18.tmp#id2060 index18.tmp#id2057
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 index18.tmp#id2003 index18.tmp#id2004 index18.tmp#id2005 index18.tmp#id2002 index18.tmp#id2066 index18.tmp#id2067 index18.tmp#id2068 index15.tmp#id497 index15.tmp#id445 index15.tmp#id960 index15.tmp#id961 index15.tmp#id500 index18.tmp#id2064 index18.tmp#id2065 index18.tmp#id2063 index18.tmp#id2001 index18.tmp#id1986
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 index18.tmp#id2062 index18.tmp#id2061
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 index18.tmp#id2003 index18.tmp#id2004 index18.tmp#id2005 index18.tmp#id2002 index18.tmp#id2066 index18.tmp#id2067 index18.tmp#id2068 index15.tmp#id497 index15.tmp#id445 index15.tmp#id960 index15.tmp#id961 index15.tmp#id500 index18.tmp#id2064 index18.tmp#id2065 index18.tmp#id2063 index18.tmp#id2073 index18.tmp#id2074 index18.tmp#id2075 index15.tmp#id497 index15.tmp#id445 index15.tmp#id960 index15.tmp#id961 index15.tmp#id500 index18.tmp#id2071 index18.tmp#id2072 index18.tmp#id2070 index18.tmp#id2000
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 index18.tmp#id2062 index18.tmp#id2061
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 index0.tmp#id488 index0.tmp#id454 index0.tmp#id474 index0.tmp#id476 index0.tmp#id453 index0.tmp#id452 index15.tmp#id489 index15.tmp#id490 index15.tmp#id451 index15.tmp#id450 index17.tmp#id515 index18.tmp#id2077 index18.tmp#id2076 index18.tmp#id972 index18.tmp#id973 index17.tmp#id513
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 index18.tmp#id2081 index18.tmp#id2080 index18.tmp#id2078 index18.tmp#id2079
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 index18.tmp#id2088 index18.tmp#id2082 index18.tmp#id2084 index18.tmp#id2083 index18.tmp#id2103
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 index0.tmp#id456 index17.tmp#id513 index17.tmp#id969
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 index0.tmp#id488 index0.tmp#id454 index0.tmp#id474 index0.tmp#id476 index0.tmp#id453 index0.tmp#id452 index15.tmp#id489 index15.tmp#id490 index15.tmp#id451 index15.tmp#id450 index17.tmp#id515 index18.tmp#id2091 index18.tmp#id2089 index18.tmp#id2090 index17.tmp#id513
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 index18.tmp#id2088 index18.tmp#id2093 index17.tmp#id516 index17.tmp#id524 index18.tmp#id2092 index18.tmp#id2081
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 index18.tmp#id2088 index18.tmp#id2096 index17.tmp#id516 index18.tmp#id2095 index18.tmp#id2081
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 index18.tmp#id2088 index18.tmp#id2098 index17.tmp#id516 index18.tmp#id2097 index18.tmp#id2081
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 index0.tmp#id488 index0.tmp#id454 index0.tmp#id474 index0.tmp#id476 index0.tmp#id453 index0.tmp#id452 index15.tmp#id489 index15.tmp#id490 index15.tmp#id451 index17.tmp#id523 index18.tmp#id1938 index18.tmp#id2099 index17.tmp#id519
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 index15.tmp#id961 index15.tmp#id497 index15.tmp#id445 index15.tmp#id1676 index15.tmp#id1677
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 index18.tmp#id2088 index18.tmp#id2104 index18.tmp#id2105 index18.tmp#id2081
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 index18.tmp#id2088 index18.tmp#id2104 index18.tmp#id2102 index18.tmp#id2101 index18.tmp#id2107 index18.tmp#id2108 index18.tmp#id2106 index18.tmp#id2085 index18.tmp#id2086 index18.tmp#id2087 index18.tmp#id2103
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