メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((137.381865445202 34.8205192708902, 137.382107471386 34.8210975107566, 137.382133039572 34.8211676160287, 137.380530833797 34.821575335231, 137.380299692234 34.8209333332376, 137.380095265745 34.820376858663, 137.381632389586 34.8199920077391, 137.381865445202 34.8205192708902)) ^^http://www.opengis.net/ont/geosparql#wktLiteral