メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.74588783161 43.2039569906316, 141.746349253261 43.2041897643898, 141.745002283544 43.205601862147, 141.744562886949 43.2053907007196, 141.744575398823 43.2053773933405, 141.744096687991 43.2051425670846, 141.745424165866 43.2037230101743, 141.74588783161 43.2039569906316)) ^^http://www.opengis.net/ont/geosparql#wktLiteral