メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((144.318252321799 43.2373656564046, 144.317920321629 43.2372587191712, 144.31714481328 43.2371889829834, 144.316404127438 43.2373070794814, 144.315912480414 43.2375365668802, 144.315111863763 43.2359095953203, 144.31569832751 43.2357765707644, 144.317453364017 43.2353800158574, 144.318252321799 43.2373656564046)) ^^http://www.opengis.net/ont/geosparql#wktLiteral