メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.782917400869 43.2096256115009, 141.782393942272 43.2102052359269, 141.782333677868 43.2102720149308, 141.781590987595 43.2110456192508, 141.780732420347 43.2106240719312, 141.779963780481 43.2102368574912, 141.780425730545 43.2096508043148, 141.780824371298 43.2091955120317, 141.781189402151 43.2087464801571, 141.781290807516 43.2087882485898, 141.782298196519 43.2093172270771, 141.782613509256 43.2094631795069, 141.782917400869 43.2096256115009)) ^^http://www.opengis.net/ont/geosparql#wktLiteral