Association to the engineering datum used by this CRS.
<gml:usesEngineeringDatum xlink:href="" nilReason="" xmlns:gml="http://www.opengis.net/gml/3.2"> <gml:EngineeringDatum gml:id="">{1,1}</gml:EngineeringDatum> </gml:usesEngineeringDatum>
<element name="usesEngineeringDatum" type="gml:EngineeringDatumRefType"> <annotation> <documentation>Association to the engineering datum used by this CRS.</documentation> </annotation> </element>