private static void GjettOmrådetype(Feature jsonFeature, Area area)
        {
            var properties = jsonFeature.Properties;

            if (properties.ContainsKey("objtype") && properties["objtype"] == "Fylke")
            {
                area.Type   = AreaType.Fylke;
                area.Number = int.Parse(properties["fylkesnr"]);
            }
            else if (properties.ContainsKey("objtype") && properties["objtype"] == "Kommune")
            {
                area.Type   = AreaType.Kommune;
                area.Number = int.Parse(properties["komm"]);
            }
            else
            {
                throw new AreaConverterException("Unknown source file");
            }
        }
        private static Area JsonFeatureToArea(Feature jsonFeature, int sourceEpsgCode)
        {
            var area = new Area {
                Name = jsonFeature.Properties["navn"]
            };

            GjettOmrådetype(jsonFeature, area);

            var geometry = new SqlGeometryBuilder();

            geometry.SetSrid(sourceEpsgCode);
            geometry.BeginGeometry(OpenGisGeometryType.Polygon);

            var coordinates = jsonFeature.Geometry.Coordinates;

            foreach (var feature in coordinates)
            {
                for (int j = 0; j < feature.Count; ++j)
                {
                    var coordinate = feature[j];
                    if (j == 0)
                    {
                        geometry.BeginFigure(coordinate[0], coordinate[1]);
                    }
                    else
                    {
                        geometry.AddLine(coordinate[0], coordinate[1]);
                    }
                }
                geometry.EndFigure();
            }

            geometry.EndGeometry();
            area.Geometry = geometry.ConstructedGeometry.MakeValid();

            return(area);
        }