メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.35555492736 43.1026991499296, 141.355793253183 43.1027310374235, 141.355806567407 43.1027328290648, 141.356010760856 43.1027623408131, 141.356564148648 43.1028424648862, 141.356589719962 43.1028461801599, 141.35630686706 43.1039797469164, 141.355741158295 43.1039081074164, 141.355272576879 43.1038433416159, 141.354720952918 43.1037668832486, 141.355012660254 43.102626561577, 141.35555492736 43.1026991499296)) ^^http://www.opengis.net/ont/geosparql#wktLiteral