Convert Degrees/Minutes/Seconds to Decimal Coordinates

Question

In one part of my code I convert from decimal coordinates to degrees/minutes/seconds and I use this:

double coord = 59.345235;
int sec = (int)Math.Round(coor         


        

Answer 1

For those who prefer regular expression and to handle format like DDMMSS.ffffdS This function could easily be updated to handle other format.

C#

Regex reg = new Regex(@"^((?\d{1,2}(\.\d+)?)(?[SN])|(?\d{2})(?\d{2}(\.\d+)?)(?[SN])|(?\d{2})(?\d{2})(?\d{2}(\.\d+)?)(?[SN])|(?\d{1,3}(\.\d+)?)(?[WE])|(?\d{3})(?\d{2}(\.\d+)?)(?[WE])|(?\d{3})(?\d{2})(?\d{2}(\.\d+)?)(?[WE]))$");

private double DMS2Decimal(string dms)
            {
                double result = double.NaN;            

                var match = reg.Match(dms);

                if (match.Success)
                {
                    var degrees = double.Parse("0" + match.Groups["D"]);
                    var minutes = double.Parse("0" + match.Groups["M"]);
                    var seconds = double.Parse("0" + match.Groups["S"]);
                    var direction = match.Groups["W"].ToString();
                    var dec = (Math.Abs(degrees) + minutes / 60d + seconds / 3600d) * (direction == "S" || direction == "W" ? -1 : 1);
                    var absDec = Math.Abs(dec);

                    if ((((direction == "W" || direction == "E") && degrees <= 180 & absDec <= 180) || (degrees <= 90 && absDec <= 90)) && minutes < 60 && seconds < 60)
                    {
                        result = dec;
                    }

                }

                return result;

            }