DmsToDeg
The DmsToDms function converts an angle string containing Degrees, minutes, and seconds to a decimal Degree value.
nDegrees = DmsToDeg( sDms )
sDms is a string containing Degrees, minutes, and seconds (e.g., "-25:39:50.4").
nDegrees is the returned value in decimal degrees (e.g., -25.664).
This function converts a string to a decimal number of Degrees. To do the reverse conversion, use DegToDms.