メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.466193215588 43.0497898348281, 141.467894467905 43.0503937404011, 141.467542364614 43.0509043981308, 141.466788049531 43.0520599811604, 141.466213752244 43.0518603152566, 141.465761487004 43.0516986180788, 141.465294889902 43.0515366802901, 141.464570018317 43.0512673294061, 141.46398876868 43.0510575476528, 141.463428666511 43.0508629585157, 141.464175312644 43.0497072022866, 141.464506428467 43.0491860016111, 141.46541373885 43.0495108033903, 141.466193215588 43.0497898348281)) ^^http://www.opengis.net/ont/geosparql#wktLiteral