メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.340710474721 43.7436315886436, 142.340045836293 43.7447550596736, 142.339476828357 43.7445986988499, 142.339485079354 43.7445868962815, 142.337075308564 43.7438543018907, 142.339042417722 43.742609495257, 142.339889110043 43.7428728664993, 142.340073515341 43.7429282210068, 142.340963341948 43.7431953633658, 142.340735065551 43.7436389336308, 142.340710474721 43.7436315886436)) ^^http://www.opengis.net/ont/geosparql#wktLiteral