メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.747263463496 43.2025369967492, 141.747707617829 43.2027647684138, 141.746971010261 43.2035375335514, 141.746349253261 43.2041897643898, 141.74588783161 43.2039569906316, 141.745424165866 43.2037230101743, 141.746053790034 43.2030671575294, 141.746793799968 43.2022960997178, 141.747263463496 43.2025369967492)) ^^http://www.opengis.net/ont/geosparql#wktLiteral