メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.413768812457 43.1300574039357, 141.413206468784 43.1308555960099, 141.413174887633 43.1308969991579, 141.412845632827 43.1307695954642, 141.412475143744 43.130638088741, 141.412120062407 43.1305104925721, 141.411466613973 43.1302864505105, 141.411859157479 43.1296747266545, 141.412093014824 43.1291581847169, 141.412305617667 43.1284258515901, 141.412317259682 43.1283678435546, 141.412333218906 43.1282889801277, 141.413249722226 43.1286345177236, 141.414464300844 43.1290562995677, 141.413768812457 43.1300574039357)) ^^http://www.opengis.net/ont/geosparql#wktLiteral