メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((144.991079061339 43.5572115618331, 144.99112143085 43.5571778470837, 144.991506340265 43.5574521693223, 144.991020729835 43.5578479383312, 144.990581277925 43.5576075859731, 144.990080312939 43.5573327044683, 144.99057435213 43.5568796750394, 144.991079061339 43.5572115618331)) ^^http://www.opengis.net/ont/geosparql#wktLiteral