メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.416972734343 43.7870011219865, 142.417329508689 43.7872283793394, 142.417686245889 43.7874405333518, 142.418202723868 43.7877571812013, 142.418705822673 43.7880813882157, 142.417446422524 43.789115157589, 142.416937533312 43.7887986180083, 142.416421034477 43.7884798195857, 142.416085148491 43.7882611445891, 142.415741805831 43.7880435683796, 142.415386520623 43.7878152139048, 142.416602538881 43.7867727747351, 142.416972734343 43.7870011219865)) ^^http://www.opengis.net/ont/geosparql#wktLiteral