メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.382339061663 43.7851413285212, 142.381549521614 43.7853681726303, 142.38099168922 43.7843717752914, 142.381779703775 43.784156856189, 142.381822311542 43.78423764349, 142.381973790866 43.784492529713, 142.382124121982 43.7847815767731, 142.382339061663 43.7851413285212)) ^^http://www.opengis.net/ont/geosparql#wktLiteral