メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((137.007292198258 34.8927109886302, 137.006198404822 34.8931585208608, 137.005422971206 34.8919069714565, 137.0052168887 34.8916512534151, 137.005152377769 34.8915850356397, 137.006266288538 34.8910595074842, 137.007015669296 34.8922712958869, 137.007292198258 34.8927109886302)) ^^http://www.opengis.net/ont/geosparql#wktLiteral