メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((138.840757249224 37.4464314137965, 138.84203141612 37.4469165529073, 138.841720240365 37.4474641679908, 138.841393033498 37.4479877514632, 138.840150947857 37.4475371482142, 138.839472789241 37.447288211869, 138.838830859152 37.4470447991356, 138.838854103031 37.446976166423, 138.83884329874 37.4466744714701, 138.838810787567 37.4464584443911, 138.839292320907 37.4466078465641, 138.839303125273 37.4465852881239, 138.839544341643 37.4462476693061, 138.840187251866 37.4462106100398, 138.840757249224 37.4464314137965)) ^^http://www.opengis.net/ont/geosparql#wktLiteral