メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.36981482835 43.0546288433832, 141.369465311323 43.0548397468247, 141.369212342824 43.0550053954479, 141.368751173017 43.0552909713871, 141.368516250323 43.0554438977575, 141.368353003464 43.0555501645922, 141.367841654651 43.0550935116889, 141.368250774368 43.0548398194469, 141.368671929759 43.0545758100638, 141.368963071112 43.0543897792976, 141.369286521234 43.0541976660661, 141.36981482835 43.0546288433832)) ^^http://www.opengis.net/ont/geosparql#wktLiteral