gml:PolarCS ia s two-dimensional coordinate system in which position isspecified by the distance from the origin and the angle between the line from the origin toa point and a reference direction. A PolarCS shall have two gml:axis propertyelements.
Database handle for the object. It is of XML type ID, so is constrained to beunique in the XML document within which it occurs. An external identifier for the object inthe form of a URI may be constructed using standard XML and XPointer methods. This is doneby concatenating the URI for the document, a fragment separator, and the value of the idattribute.
Source
<element name="PolarCS" type="gml:PolarCSType" substitutionGroup="gml:AbstractCoordinateSystem"><annotation><documentation>gml:PolarCS ia s two-dimensional coordinate system in which position is specified by the distance from the origin and the angle between the line from the origin to a point and a reference direction. A PolarCS shall have two gml:axis property elements.</documentation></annotation></element>