メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.289874031403 43.0659099526537, 141.290344641435 43.0662898095447, 141.290508240204 43.0664279012407, 141.289643385199 43.0669144261824, 141.289245361098 43.0671318474721, 141.288996793655 43.0672688015048, 141.288775935326 43.0673942418321, 141.2882319356 43.0673093546193, 141.288280874532 43.0671425937563, 141.288376532463 43.0668160857849, 141.288398640906 43.0667702059039, 141.288596320611 43.0663050230792, 141.288705343911 43.0660376334319, 141.288907631402 43.0655412614075, 141.289679540799 43.0657601373574, 141.289874031403 43.0659099526537)) ^^http://www.opengis.net/ont/geosparql#wktLiteral