メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((140.475618740588 40.6022011411604, 140.475814813148 40.6025085927939, 140.475558780823 40.6026585125492, 140.475371213301 40.6027757150198, 140.475032326631 40.6029554883709, 140.474632215008 40.6031597688894, 140.474400160661 40.6028576237299, 140.474198563554 40.6025528988475, 140.475350014445 40.6019158406624, 140.475618740588 40.6022011411604)) ^^http://www.opengis.net/ont/geosparql#wktLiteral