メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.342340800721 43.7441210556155, 142.341666551444 43.7452543104107, 142.34107977089 43.7450744150043, 142.340472398855 43.7448973632584, 142.340045836293 43.7447550596736, 142.340710474721 43.7436315886436, 142.340735065551 43.7436389336308, 142.340963341948 43.7431953633658, 142.342592142357 43.7436990187553, 142.342340800721 43.7441210556155)) ^^http://www.opengis.net/ont/geosparql#wktLiteral