メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.756737480289 43.1921704676407, 141.755823331598 43.1917178349499, 141.757174825252 43.1902918504355, 141.75730287267 43.1903549228948, 141.758102812242 43.190749173663, 141.757643281846 43.1912277508065, 141.757595561038 43.1912812055527, 141.757516708826 43.1913695504267, 141.757338403118 43.1915620444143, 141.757323431112 43.1915711224244, 141.756737480289 43.1921704676407)) ^^http://www.opengis.net/ont/geosparql#wktLiteral