メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((140.749212147753 38.0499650383407, 140.748551376175 38.0502844240598, 140.748399456774 38.0503133152776, 140.747986208415 38.0498042207495, 140.747586962268 38.0499953962091, 140.747418645655 38.0498205594366, 140.747037526948 38.0500002017609, 140.747028834377 38.0499309292622, 140.74676784807 38.0498876570481, 140.745698594462 38.0484688692003, 140.746583245466 38.0480587240637, 140.747649232372 38.0475902777355, 140.748412177929 38.0484658121161, 140.749604665964 38.0497755426459, 140.749212147753 38.0499650383407)) ^^http://www.opengis.net/ont/geosparql#wktLiteral