<complexType name="ImageCRSType">
<annotation>
<documentation>An engineering coordinate reference system applied to locations in images. Image coordinate reference systems are treated as a separate sub-type because a separate user community exists for images with its own terms of reference. </documentation>
</annotation>
<complexContent>
<extension base="gml:AbstractReferenceSystemType">
<sequence>
<choice>
<element ref="gml:usesCartesianCS" />
<element ref="gml:usesObliqueCartesianCS" />
</choice>
<element ref="gml:usesImageDatum" />
</sequence>
</extension>
</complexContent>
</complexType>
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