メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.423845190815 43.0531669881081, 141.423361212886 43.0534287125855, 141.422665000955 43.0538760508265, 141.42153456963 43.0545485369949, 141.421097809056 43.0541572950898, 141.420734934616 43.0538274211549, 141.420438049908 43.0535613217802, 141.420327686077 43.0534529874721, 141.420127657978 43.0532515887453, 141.421503769096 43.0527874535766, 141.422541071034 43.052434860427, 141.423085450971 43.0522312468772, 141.423566544769 43.0520553765064, 141.424382545582 43.0528364422729, 141.423845190815 43.0531669881081)) ^^http://www.opengis.net/ont/geosparql#wktLiteral