メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.364451807989 43.0834325394551, 141.364337587565 43.0840008251181, 141.362984497623 43.0838147373286, 141.363041537576 43.0835990595347, 141.363090110032 43.0834248102134, 141.363140443977 43.0832614048939, 141.363290791796 43.0826504290378, 141.364331917531 43.0828039983588, 141.364571506931 43.0828368666423, 141.364451807989 43.0834325394551)) ^^http://www.opengis.net/ont/geosparql#wktLiteral