メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.351501993082 43.0564951998389, 141.35134902816 43.0570595899745, 141.349770303584 43.0568549656071, 141.349912267455 43.0562831057407, 141.350054899942 43.055711251774, 141.351639936918 43.0559216190174, 141.351501993082 43.0564951998389)) ^^http://www.opengis.net/ont/geosparql#wktLiteral