The mapping function from the domain to the range for gridded locations. If omitted,gml:startPoint is assumed to be the value of gml:low in the gml:Grid geometry,gml:sequenceRule is assumed to be linear, and gml:axisOrder is assumed to be "+1+2".
<element name="gridMappingFunction" substitutionGroup="gml:AbstractObject" type="gml:CoverageFunctionType"><annotation><documentation>The mapping function from the domain to the range for gridded locations. If omitted, gml:startPoint is assumed to be the value of gml:low in the gml:Grid geometry, gml:sequenceRule is assumed to be linear, and gml:axisOrder is assumed to be "+1 +2".</documentation></annotation></element>