メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.377013123467 38.4304726609868, 141.376801020691 38.4304736432385, 141.376323292408 38.4303967415037, 141.375651423288 38.4302758288666, 141.375626581272 38.4303519598404, 141.374588591674 38.4302048589603, 141.374734513298 38.4296703832588, 141.374737728727 38.4296219432828, 141.374731167383 38.4295762232705, 141.374624805516 38.4292750417969, 141.374851522701 38.4293439589457, 141.375805573422 38.4298312657207, 141.375895878491 38.4296669911861, 141.377119335382 38.4301450178332, 141.377013123467 38.4304726609868)) ^^http://www.opengis.net/ont/geosparql#wktLiteral