メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((136.991495391164 34.9760090648168, 136.991599698609 34.9757744936539, 136.991681353837 34.9756001028412, 136.99180890928 34.9756048658898, 136.99199263048 34.9756325985339, 136.992462674872 34.9756941268924, 136.992220821292 34.9760729383836, 136.991495391164 34.9760090648168)) ^^http://www.opengis.net/ont/geosparql#wktLiteral