メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.354036118964 43.059218201852, 141.353887911455 43.0597929013866, 141.352320177215 43.0595854430179, 141.352464207838 43.0590088143078, 141.352605900823 43.0584278774372, 141.354194190112 43.058644353478, 141.354036118964 43.059218201852)) ^^http://www.opengis.net/ont/geosparql#wktLiteral