メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.343759556287 43.0796723544666, 141.343752256916 43.0796793290381, 141.343634808667 43.0797973246025, 141.343430585835 43.0800026823319, 141.343347266303 43.0800808691009, 141.342824932396 43.0798415233333, 141.342958229725 43.0793959909331, 141.343309349369 43.0790522235135, 141.344010846594 43.079433837291, 141.343759556287 43.0796723544666)) ^^http://www.opengis.net/ont/geosparql#wktLiteral