メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((140.907323365535 36.9489552919036, 140.906538173216 36.9490949431815, 140.906363609099 36.9483539238414, 140.906225037401 36.9477904139188, 140.906096765788 36.947223218993, 140.906904658533 36.9472029771137, 140.907323365535 36.9489552919036)) ^^http://www.opengis.net/ont/geosparql#wktLiteral