メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.778977651312 43.2114546274825, 141.779206250225 43.2119421026753, 141.778680674862 43.211699980402, 141.776789903538 43.2107178511237, 141.777280227912 43.2102106270645, 141.777619124786 43.2098326029563, 141.777995968578 43.209433143416, 141.778299682653 43.2100428063254, 141.778977651312 43.2114546274825)) ^^http://www.opengis.net/ont/geosparql#wktLiteral