メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.36131060751 43.0835856342985, 141.360673708229 43.0835051551969, 141.359750542108 43.0833884773244, 141.360030826328 43.0822219367808, 141.361606743901 43.082435739278, 141.361418371308 43.08320022666, 141.361410133542 43.0831992481041, 141.36131060751 43.0835856342985)) ^^http://www.opengis.net/ont/geosparql#wktLiteral