メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((140.932359854343 38.1369948962497, 140.930942126441 38.1383785454409, 140.930111359111 38.1378835126575, 140.930736861006 38.1371213700544, 140.929673146899 38.1345982423892, 140.930604075378 38.1342579258534, 140.931183980747 38.1339805360338, 140.932359854343 38.1369948962497)) ^^http://www.opengis.net/ont/geosparql#wktLiteral