メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.653855792224 42.8279918834824, 141.65406618189 42.8282720610777, 141.653342855648 42.8285438541064, 141.652185217093 42.8289705666022, 141.651824930697 42.8291042142006, 141.651008688366 42.8294074366214, 141.650877451784 42.8292730469028, 141.651541861615 42.8286971935206, 141.652765076686 42.8276924120929, 141.653344781287 42.8272367964896, 141.653417088907 42.8273436578074, 141.653855792224 42.8279918834824)) ^^http://www.opengis.net/ont/geosparql#wktLiteral