public static CoordinateSet GridSquareToLatLon(string locator)
{
var coordinates = new CoordinateSet();
locator = locator.ToUpper();
if (locator.Length == 4)
{
locator += "IL"; //somewhere near the center of the grid
}
if (!Regex.IsMatch(locator, "^[A-R]{2}[0-9]{2}[A-X]{2}$"))
{
return(null);
}
coordinates.Longitude.Value = (locator[0] - 'A') * 20 + (locator[2] - '0') * 2 + (locator[4] - 'A' + 0.5) / 12 - 180;
coordinates.Latitude.Value = (locator[1] - 'A') * 10 + (locator[3] - '0') + (locator[5] - 'A' + 0.5) / 24 - 90;
return(coordinates);
}
public static string LatLonToGridSquare(CoordinateSet coordinateSet)
{
return(LatLonToGridSquare(coordinateSet.Latitude.Value, coordinateSet.Longitude.Value));
}