メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.382131816413 43.0410867118171, 141.380889415649 43.041858236475, 141.380248961265 43.0412976924166, 141.380310574385 43.0412596900522, 141.381493124687 43.0405368782011, 141.382131816413 43.0410867118171)) ^^http://www.opengis.net/ont/geosparql#wktLiteral