メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((144.098873197799 43.8244822866016, 144.098782359948 43.8245098109434, 144.098133294944 43.8233751841272, 144.098218586049 43.8233504575654, 144.098960767571 43.8231350216273, 144.100244603875 43.8227655566726, 144.100924697363 43.8238535219856, 144.098873197799 43.8244822866016)) ^^http://www.opengis.net/ont/geosparql#wktLiteral