メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.744670702422 43.1902782236039, 141.744253167123 43.1907217026411, 141.743835809187 43.1911429567537, 141.743277470283 43.1917348358333, 141.742188158654 43.1911725227837, 141.741704326238 43.1909264099559, 141.742253489727 43.1903581974074, 141.742272152158 43.1903388698479, 141.742665199831 43.1899175137327, 141.743082556763 43.1894963340171, 141.744670702422 43.1902782236039)) ^^http://www.opengis.net/ont/geosparql#wktLiteral