メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((144.266058130173 44.0218961987652, 144.264224418447 44.0217189619157, 144.264045344692 44.0217084413087, 144.264159379395 44.0210936142364, 144.26460549966 44.021134365953, 144.266167648193 44.0212867224323, 144.266058130173 44.0218961987652)) ^^http://www.opengis.net/ont/geosparql#wktLiteral