メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((144.266167648193 44.0212867224323, 144.26460549966 44.021134365953, 144.264724403426 44.0205656578906, 144.266280813272 44.0207159182964, 144.266167648193 44.0212867224323)) ^^http://www.opengis.net/ont/geosparql#wktLiteral