<complexType name="GeocentricCRSType">
<annotation>
<documentation>A 3D coordinate reference system with the origin at the approximate centre of mass of the earth. A geocentric CRS deals with the earth's curvature by taking a 3D spatial view, which obviates the need to model the earth's curvature. </documentation>
</annotation>
<complexContent>
<extension base="gml:AbstractReferenceSystemType">
<sequence>
<choice>
<element ref="gml:usesCartesianCS" />
<element ref="gml:usesSphericalCS" />
</choice>
<element ref="gml:usesGeodeticDatum" />
</sequence>
</extension>
</complexContent>
</complexType>
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