メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.723797512036 45.3834414139413, 141.720912152404 45.3829507136148, 141.720317111273 45.3805096271662, 141.720669259268 45.3798164059179, 141.722737118718 45.3802009816182, 141.722245022379 45.3817641647602, 141.724263488726 45.38209463127, 141.723797512036 45.3834414139413)) ^^http://www.opengis.net/ont/geosparql#wktLiteral