メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((140.59294724741 37.6653267894907, 140.592773358306 37.6653643769269, 140.592623457704 37.6653923754531, 140.592132931489 37.6654763502816, 140.591970529536 37.6651030443338, 140.59254067577 37.6649857516639, 140.592834348135 37.6649366926645, 140.59294724741 37.6653267894907)) ^^http://www.opengis.net/ont/geosparql#wktLiteral