メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.332679524886 43.0542509418985, 141.332962561314 43.0542750138789, 141.332925648383 43.0545702418987, 141.332613242503 43.0545282818921, 141.331912547495 43.0544524004435, 141.331077367603 43.0543591881498, 141.331111238614 43.0541398219787, 141.331281144641 43.054155041165, 141.332679524886 43.0542509418985)) ^^http://www.opengis.net/ont/geosparql#wktLiteral