メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.348776760791 43.0276503936917, 141.348763066396 43.0276494423241, 141.348688588058 43.0283240274734, 141.348025119571 43.0282720301081, 141.347961434307 43.0282677300353, 141.347355994137 43.0282266648851, 141.347429535587 43.0276825363652, 141.34744768818 43.0275558039953, 141.347531996229 43.0268982457255, 141.348864640421 43.0269901205048, 141.348776760791 43.0276503936917)) ^^http://www.opengis.net/ont/geosparql#wktLiteral