メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.312759724811 43.0636519007426, 141.312434266031 43.0638600797089, 141.312102542714 43.0640763658976, 141.311649807632 43.0636928075744, 141.311391544269 43.063482585888, 141.311663461184 43.0632066647814, 141.311873847263 43.0629839702785, 141.311924039938 43.0629444349797, 141.312585898702 43.0635086936573, 141.312759724811 43.0636519007426)) ^^http://www.opengis.net/ont/geosparql#wktLiteral