メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.87999527041 43.0175671207072, 142.878888455995 43.0168503501188, 142.879329272787 43.016421666617, 142.879826111728 43.0159846572761, 142.880966578832 43.0167029909375, 142.880029477268 43.0175381682899, 142.87999527041 43.0175671207072)) ^^http://www.opengis.net/ont/geosparql#wktLiteral