メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.759968262937 43.1895429659336, 141.760378173223 43.189749938551, 141.760414121768 43.1897678155204, 141.759705512695 43.1905019570631, 141.759026220226 43.1912097770424, 141.758585409821 43.1909898689756, 141.758102812242 43.190749173663, 141.758792002622 43.1900127041738, 141.759488674688 43.1892996859584, 141.759968262937 43.1895429659336)) ^^http://www.opengis.net/ont/geosparql#wktLiteral