メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.373900468811 43.0520984216, 141.373591569489 43.0523009987281, 141.373059042459 43.0518627026217, 141.373401018415 43.0516674136537, 141.373936458041 43.051314376142, 141.374187961846 43.0511484932051, 141.374712188064 43.05160423183, 141.373900468811 43.0520984216)) ^^http://www.opengis.net/ont/geosparql#wktLiteral