FeatureGeometrySpatialObjectGML LiteralhasGeometryhas serializationWell-known Text LiteralasGMLasWKTcoordinateDimensiondefaultGeometrydimensioncontainscoveredBycoversdisjointequalsinsidemeetoverlapisEmptyisSimpledisconnectedexternally connectedequalsnon-tangential proper partnon-tangential proper part inversepartially overlappingtangential proper parttangential proper part inversecontainscrossesdisjointequalsintersectsoverlapstoucheswithinspatialDimension