メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((136.744315512875 35.4131219641409, 136.744121275513 35.4135033183036, 136.743905653536 35.4134240104806, 136.74400394287 35.4132316124753, 136.742960055596 35.412863988874, 136.743056360882 35.4126811610556, 136.744315512875 35.4131219641409)) ^^http://www.opengis.net/ont/geosparql#wktLiteral