メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.37157300115 43.0520630736988, 141.372056510106 43.0524882003362, 141.371422181298 43.0528744379936, 141.370690964414 43.0533356721872, 141.370188990272 43.0529009032047, 141.369680915906 43.0524505417981, 141.370032378962 43.0522232653666, 141.370202098914 43.0521242798286, 141.371051169795 43.0516022037943, 141.37157300115 43.0520630736988)) ^^http://www.opengis.net/ont/geosparql#wktLiteral