メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.353927290855 43.0532743409031, 141.353751022226 43.0538934802833, 141.352230565322 43.0536903309918, 141.352244683977 43.0536231358237, 141.352348540162 43.0532487411288, 141.352387295485 43.0530638669206, 141.352541638675 43.0524890763461, 141.354079902929 43.0527055129371, 141.353927290855 43.0532743409031)) ^^http://www.opengis.net/ont/geosparql#wktLiteral