メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((140.522013097039 39.2213370561425, 140.521443480683 39.2216354204474, 140.521341825014 39.2215090312114, 140.520663420249 39.2208790908268, 140.521207820198 39.2204712278087, 140.52138919474 39.2206615936137, 140.522013097039 39.2213370561425)) ^^http://www.opengis.net/ont/geosparql#wktLiteral