メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.754292891589 43.1919013175092, 141.75354774322 43.1926536953807, 141.753101643042 43.192429102949, 141.753021548504 43.1923909893772, 141.752632711994 43.192187600089, 141.753992422814 43.1907842614492, 141.754361498883 43.1909702598539, 141.754466448528 43.1910250779565, 141.754902376528 43.1912470197407, 141.754292891589 43.1919013175092)) ^^http://www.opengis.net/ont/geosparql#wktLiteral