メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((143.046204400873 42.9040521526731, 143.046218476247 42.9040531099928, 143.046741654477 42.9040871022707, 143.046887100531 42.9040966411962, 143.046823331761 42.9045191539479, 143.046712358353 42.9056218351302, 143.046002807504 42.9055775325267, 143.045178233171 42.9055168587731, 143.045390974979 42.9039938659958, 143.046204400873 42.9040521526731)) ^^http://www.opengis.net/ont/geosparql#wktLiteral