メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((140.342392481935 37.3876059157957, 140.341821871774 37.3876738368529, 140.341432403064 37.3872222873788, 140.342333417061 37.3866994504819, 140.34282294107 37.386865598034, 140.342392481935 37.3876059157957)) ^^http://www.opengis.net/ont/geosparql#wktLiteral