メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.338703250053 43.0364375055975, 141.33861774545 43.0371167045099, 141.336904318261 43.0369757474973, 141.336905731788 43.0369645059802, 141.336987705488 43.0363307129474, 141.336992308161 43.0362919275174, 141.337070309129 43.0356350346937, 141.338787027415 43.035771232545, 141.338753746171 43.0360702219308, 141.338703250053 43.0364375055975)) ^^http://www.opengis.net/ont/geosparql#wktLiteral