メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((138.855899411152 37.4305263322094, 138.856132479063 37.4309284417121, 138.855076147597 37.4313220584563, 138.854601006765 37.4315091999721, 138.854109986757 37.431961364054, 138.853765481215 37.4322879191086, 138.852601812309 37.4317704664287, 138.852452980785 37.4316950240015, 138.852965495848 37.4314527274475, 138.85302699139 37.431422554716, 138.854205616338 37.4308127476883, 138.854671873728 37.4305586169483, 138.855167209753 37.4303031280774, 138.855643823421 37.4300655768711, 138.855899411152 37.4305263322094)) ^^http://www.opengis.net/ont/geosparql#wktLiteral