メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.856773326097 43.3466420763682, 141.852975081628 43.3472420764472, 141.852541239373 43.345714774659, 141.856345250412 43.3451283820576, 141.856773326097 43.3466420763682)) ^^http://www.opengis.net/ont/geosparql#wktLiteral