メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.250421455006 43.1233256270054, 141.250830079414 43.1236209846045, 141.251238471136 43.1239249897422, 141.251601686449 43.1242086971037, 141.250465515976 43.1248594618593, 141.249597908067 43.125355234906, 141.249187029598 43.1250682216174, 141.24892550078 43.1248551612731, 141.24879469637 43.1247569651179, 141.248415673792 43.1244658667859, 141.248059228816 43.1241917040097, 141.247770456068 43.1239717214782, 141.248323585445 43.1236720339926, 141.248604850667 43.1235105559359, 141.249351412705 43.123112193683, 141.249832928069 43.1228698244094, 141.250421455006 43.1233256270054)) ^^http://www.opengis.net/ont/geosparql#wktLiteral