メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.757732739415 43.1984627195284, 141.75733420463 43.198872988621, 141.75696783091 43.1992519587478, 141.756935932388 43.1992857194123, 141.755932533313 43.1987830499286, 141.756315899675 43.1983775032132, 141.756728840358 43.197939589717, 141.756780856298 43.1978843955059, 141.757777633486 43.1984086897247, 141.757732739415 43.1984627195284)) ^^http://www.opengis.net/ont/geosparql#wktLiteral