メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((131.458768550979 31.911552582859, 131.4571880758 31.9124127495708, 131.45656345276 31.9119117109779, 131.456563385507 31.9118981132367, 131.45639153032 31.9111308571816, 131.456241381412 31.9103003940533, 131.456066537325 31.9093198719577, 131.458434407516 31.9089660363338, 131.458498399447 31.9092850631929, 131.458221768069 31.9093609751638, 131.458808129245 31.9107658052937, 131.458480840976 31.9108634628436, 131.458655325988 31.9112921471386, 131.458768550979 31.911552582859)) ^^http://www.opengis.net/ont/geosparql#wktLiteral