メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.865821335472 43.3437079853306, 141.863849494293 43.3439899011195, 141.863231365305 43.3419690886644, 141.863269221014 43.3419633797076, 141.864445757654 43.3417867468652, 141.864455041679 43.3417850902707, 141.8651856147 43.3416544178199, 141.865821335472 43.3437079853306)) ^^http://www.opengis.net/ont/geosparql#wktLiteral