private void ParsePolygon(string parens, string mods, Color lineColor, Color polyColor, double alt, Dates date)
        {
            if (!parens.StartsWith("(") && parens.EndsWith(")"))
            {
                return;
            }
            // string the top level of parens
            parens = parens.Substring(1, parens.Length - 2);

            List <string> shapes = UiTools.SplitString(parens, ",");

            foreach (string shape in shapes)
            {
                KmlLineList lineList = new KmlLineList();
                lineList.Astronomical = astronomical;
                lineList.MeanRadius   = meanRadius;
                lineList.ParseWkt(shape, mods, alt, date);
                if (alt == 0)
                {
                    AddPolygonFlat(false, lineList, 1, polyColor, lineColor, true, true, date);
                }
                else
                {
                    AddPolygon(false, lineList, 1, polyColor, lineColor, true, true, date);
                }
            }
        }
        private void ParseLineString(string parens, string mods, Color lineColor, double alt, bool single, Dates date)
        {
            if (!parens.StartsWith("(") && parens.EndsWith(")"))
            {
                return;
            }
            if (!single)
            {
                // string the top level of parens
                parens = parens.Substring(1, parens.Length - 2);
            }
            List <string> shapes = UiTools.SplitString(parens, ",");

            foreach (string shape in shapes)
            {
                KmlLineList lineList = new KmlLineList();
                lineList.Astronomical = astronomical;
                lineList.MeanRadius   = meanRadius;

                lineList.ParseWkt(shape, mods, alt, date);
                AddPolygon(false, lineList, 1, Colors.White, lineColor, false, false, date);
            }
        }