メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.344481578951 43.0842477032131, 141.344369911269 43.0846566249061, 141.344287148399 43.0849597199234, 141.344149381948 43.0857200090249, 141.343291717065 43.0855925232591, 141.342593163623 43.0855156664523, 141.342775843933 43.0847820380378, 141.342867486976 43.0844043258933, 141.342955552527 43.084041423435, 141.344481578951 43.0842477032131)) ^^http://www.opengis.net/ont/geosparql#wktLiteral