メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.392835076716 40.7819315959839, 141.392273710556 40.7848074126879, 141.388904997166 40.7844583370112, 141.388033694786 40.7841768128929, 141.38826556185 40.7839158677017, 141.38910017122 40.7829931945847, 141.390116462707 40.7818950133256, 141.390634607192 40.7813534345479, 141.392835076716 40.7819315959839)) ^^http://www.opengis.net/ont/geosparql#wktLiteral