メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.770650645577 43.205520044792, 141.770061909327 43.2061305592254, 141.7690495023 43.2055951220269, 141.769200827536 43.2054418799866, 141.769614862029 43.204993306002, 141.770650645577 43.205520044792)) ^^http://www.opengis.net/ont/geosparql#wktLiteral