メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.33713130404 43.0907843153121, 141.337601751803 43.0908521411741, 141.338125546899 43.0909204609178, 141.337986933133 43.0914215727558, 141.337862699219 43.0919299017881, 141.337348692826 43.091854485312, 141.336873280591 43.091797308777, 141.336349489063 43.091728350533, 141.336585991404 43.0907756693688, 141.336607779629 43.0907171886386, 141.33713130404 43.0907843153121)) ^^http://www.opengis.net/ont/geosparql#wktLiteral