メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.348222382397 43.0566369177632, 141.348068574529 43.0572107911447, 141.347920931085 43.0577892841655, 141.34635311744 43.0575856825766, 141.346497660273 43.0569908507338, 141.346544839571 43.0568028621999, 141.346640681063 43.0564209733073, 141.348222382397 43.0566369177632)) ^^http://www.opengis.net/ont/geosparql#wktLiteral