メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.646964596028 43.0634498066977, 141.646825888627 43.063597825113, 141.646540912388 43.0639019083313, 141.645624075561 43.0648801492595, 141.645039363874 43.065503985681, 141.643594560511 43.0647684220438, 141.643084601139 43.0645156954178, 141.643360938474 43.0642337283439, 141.64338463148 43.0642093091455, 141.643894320517 43.0636848823313, 141.644273452437 43.0632783398163, 141.644884758084 43.0626602732752, 141.645064757814 43.062478295327, 141.646964596028 43.0634498066977)) ^^http://www.opengis.net/ont/geosparql#wktLiteral