メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((144.263009171373 44.0243290331274, 144.262361116821 44.0243518041923, 144.262235418519 44.0243464667551, 144.262004612778 44.0243278839291, 144.261447257023 44.0242433340724, 144.261620965626 44.0239684647475, 144.261968528726 44.0234806649669, 144.263085909998 44.0236023829685, 144.263009171373 44.0243290331274)) ^^http://www.opengis.net/ont/geosparql#wktLiteral