メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.364848463466 43.1112354591865, 141.365425117616 43.1113066493108, 141.365195625748 43.1121691728433, 141.365202668913 43.1121666968781, 141.365065351009 43.1127016533298, 141.364476869456 43.1126157948122, 141.363524715649 43.1124768688735, 141.363658349431 43.111952084372, 141.36387021301 43.1111022286737, 141.364848463466 43.1112354591865)) ^^http://www.opengis.net/ont/geosparql#wktLiteral