メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.355217087444 43.1059895571162, 141.35573340885 43.106052722457, 141.355621624852 43.106465090898, 141.355525221334 43.1068560586799, 141.353988818696 43.1066731943379, 141.354095753621 43.1062253433222, 141.354191809934 43.1058652448755, 141.354761031995 43.1059337507339, 141.355217087444 43.1059895571162)) ^^http://www.opengis.net/ont/geosparql#wktLiteral