メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.295068810972 43.0889731543849, 141.294592646607 43.0892647039823, 141.294806041377 43.0894139639701, 141.293681865681 43.090094014034, 141.29368449443 43.0898201759625, 141.293599425983 43.0898726336234, 141.293532927086 43.0893359608648, 141.293478577435 43.0888573405289, 141.294015595264 43.0888856675377, 141.295068810972 43.0889731543849)) ^^http://www.opengis.net/ont/geosparql#wktLiteral