メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((143.206477986926 42.9907695323404, 143.204530392742 42.9906416321018, 143.203316516296 42.9905532279611, 143.203431854719 42.9901558201899, 143.203735095218 42.9891469481019, 143.204204965483 42.9875957121838, 143.204282341848 42.9873212740119, 143.205523624614 42.9874081755944, 143.206986794105 42.9875203539767, 143.206477986926 42.9907695323404)) ^^http://www.opengis.net/ont/geosparql#wktLiteral