メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.352789184674 42.9818911051261, 141.353192003271 42.9822001990901, 141.354257603555 42.9830449818997, 141.354704764981 42.9833887385636, 141.35360593843 42.9841013768987, 141.353475219279 42.9841779277741, 141.352930003302 42.9845182057494, 141.351611909087 42.9832893255283, 141.351254676509 42.9829416211352, 141.35063420201 42.9823771979322, 141.350985411678 42.9821373871503, 141.351110342168 42.9820503860939, 141.352101267333 42.9813599224841, 141.352439771745 42.9815986757953, 141.352789184674 42.9818911051261)) ^^http://www.opengis.net/ont/geosparql#wktLiteral