メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.321952149369 43.0611100355292, 141.32182300013 43.0616403922209, 141.321116259379 43.0615475163597, 141.320478328977 43.0614587150911, 141.320591446751 43.0609743639966, 141.320601598765 43.0609309131946, 141.320772537973 43.06023794332, 141.322114639989 43.0604230436529, 141.32196743828 43.0610439095282, 141.321952149369 43.0611100355292)) ^^http://www.opengis.net/ont/geosparql#wktLiteral