メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.347920931085 43.0577892841655, 141.347771461703 43.0583743035054, 141.347617030285 43.0589443730692, 141.346524177265 43.058783834011, 141.346075610109 43.0587179779513, 141.346211295742 43.0581584520777, 141.34635311744 43.0575856825766, 141.347920931085 43.0577892841655)) ^^http://www.opengis.net/ont/geosparql#wktLiteral