メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.358031437488 43.0969737015418, 141.357644017479 43.0969270110865, 141.357085994464 43.0968585937288, 141.356484439646 43.0967810426447, 141.35676075714 43.0956319402986, 141.357391387966 43.0957155546152, 141.357917546062 43.0957836531115, 141.358318240036 43.0958343850936, 141.358031437488 43.0969737015418)) ^^http://www.opengis.net/ont/geosparql#wktLiteral