メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((140.760795373543 43.1458649060341, 140.760151142398 43.1463851726295, 140.758877006893 43.1473684229649, 140.758561562392 43.1476103869642, 140.758542763761 43.1475855980442, 140.756263592326 43.1445622870736, 140.75632818058 43.1445129868964, 140.757399746131 43.1436954176556, 140.757815937108 43.143377831369, 140.760795373543 43.1458649060341)) ^^http://www.opengis.net/ont/geosparql#wktLiteral