メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.407855441087 43.8009432104054, 142.406269835657 43.8023075991066, 142.40510970756 43.8015770187762, 142.404654001955 43.8012945183674, 142.404480206191 43.8009907505181, 142.40412454429 43.8003588592067, 142.403823828521 43.7999102221044, 142.403390397994 43.7995603703229, 142.402650364805 43.7989545121476, 142.402230514338 43.7985423838994, 142.402979342441 43.7978906482493, 142.407855441087 43.8009432104054)) ^^http://www.opengis.net/ont/geosparql#wktLiteral