メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.323914776224 43.1090191078955, 141.324254555639 43.1093453676985, 141.324559323937 43.1096701465427, 141.324947087158 43.1100294959407, 141.324579909922 43.1102148587699, 141.324198729346 43.1104311923515, 141.323818054565 43.1106201719479, 141.323471428103 43.110817301799, 141.322158676162 43.1094681071689, 141.322870914095 43.1090810399178, 141.32357660536 43.1086946181796, 141.323914776224 43.1090191078955)) ^^http://www.opengis.net/ont/geosparql#wktLiteral