The attribute gml:id supports provision of a handle for the XML element representing a GML Object. Its use is mandatory for all GML objects. It is of XML type ID, so is constrained to be unique in the XML document within which it occurs.
The "srsDimension" is the length of coordinate sequence (the number of entries in the list). This dimension is specified by the coordinate reference system.
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.
<complexType name="SelfContainedAbstractSurfaceType" abstract="true"><complexContent><restriction base="gml:AbstractSurfaceType"><attribute name="srsName" type="anyURI" use="required"><annotation><documentation>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.</documentation></annotation></attribute><attribute name="srsDimension" type="positiveInteger" use="required"><annotation><documentation>The "srsDimension" is the length of coordinate sequence (the number of entries in the list). This dimension is specified by the coordinate reference system.</documentation></annotation></attribute><attributeGroup ref="gml:SRSInformationGroup"/></restriction></complexContent></complexType>
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.
<attribute name="srsName" type="anyURI" use="required"><annotation><documentation>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.</documentation></annotation></attribute>
The "srsDimension" is the length of coordinate sequence (the number of entries in the list). This dimension is specified by the coordinate reference system.
<attribute name="srsDimension" type="positiveInteger" use="required"><annotation><documentation>The "srsDimension" is the length of coordinate sequence (the number of entries in the list). This dimension is specified by the coordinate reference system.</documentation></annotation></attribute>
