gml:SphericalCS is a three-dimensional coordinate system with one distancemeasured from the origin and two angular coordinates. A SphericalCS shall have threegml:axis property elements.
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="SphericalCS" type="gml:SphericalCSType" substitutionGroup="gml:AbstractCoordinateSystem"><annotation><documentation>gml:SphericalCS is a three-dimensional coordinate system with one distance measured from the origin and two angular coordinates. A SphericalCS shall have three gml:axis property elements.</documentation></annotation></element>