メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.355627505037 43.7456863321712, 142.356315405626 43.745880126384, 142.356304442543 43.7458994747427, 142.355847231299 43.7467062096731, 142.356033429577 43.7467660016498, 142.355547122841 43.7476220924723, 142.354923636023 43.7474271440127, 142.354489786139 43.7473004750991, 142.35397749863 43.7471437796053, 142.354441368108 43.7463009359518, 142.354907355637 43.7454769710285, 142.355606348118 43.7456803751797, 142.355627505037 43.7456863321712)) ^^http://www.opengis.net/ont/geosparql#wktLiteral