メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.321369181245 43.0487849705948, 141.322080743298 43.048885266774, 141.321954441186 43.0493906522416, 141.321809878891 43.0499690948412, 141.321634536424 43.0507151324802, 141.321559322918 43.0509774830175, 141.320159410907 43.0504177591812, 141.32019464986 43.0502562876844, 141.320311855678 43.0497602933314, 141.320558385652 43.0486767623632, 141.32058049146 43.0486798261793, 141.320870727881 43.0487205833458, 141.321278184767 43.0487717136472, 141.321369181245 43.0487849705948)) ^^http://www.opengis.net/ont/geosparql#wktLiteral