メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.342171855293 43.7478129791154, 142.341874486914 43.7483276762134, 142.341565055239 43.748849572288, 142.340923843275 43.7486570082132, 142.341551400113 43.7476297548072, 142.341862117928 43.7470750699103, 142.342498616665 43.74728231133, 142.342488598553 43.7472993551333, 142.342171855293 43.7478129791154)) ^^http://www.opengis.net/ont/geosparql#wktLiteral