メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.908525164455 43.5082650675114, 141.908517775437 43.5082560436947, 141.908116940745 43.5068609813949, 141.91145424823 43.5063408052072, 141.911863840751 43.5077460423302, 141.911574935385 43.5077872768764, 141.911061619293 43.5078740139158, 141.911029414224 43.5078794390977, 141.910179493655 43.5080103217638, 141.909697017602 43.5080846266848, 141.909099148601 43.5081766940173, 141.908525164455 43.5082650675114)) ^^http://www.opengis.net/ont/geosparql#wktLiteral