メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.263919600979 43.1201777365148, 141.26430770088 43.1205221709185, 141.264695997549 43.1208545097423, 141.263267766178 43.1217559445777, 141.262987748061 43.1219322409693, 141.262594045296 43.1215958413415, 141.262210741609 43.1212757061592, 141.261835114329 43.1209381935502, 141.263505709337 43.1198254831322, 141.263919600979 43.1201777365148)) ^^http://www.opengis.net/ont/geosparql#wktLiteral