(unknown)

[Tommy Grav]

On Nov 15, 2009, at 11:08 AM, Gabriel Genellina wrote:

> En Fri, 13 Nov 2009 16:05:26 -0300, Ronn Ross <ronn.ross at gmail.com> escribió:
> 
>> I'm attempting to convert latitude and longitude coordinates from degrees
>> minutes and second to decimal form. I would like to go from:
>>    N39 42 36.3 W77 42 51.5
>> to:
>> -77.739855,39.706666
>> 
>> Does anyone know of a library or some existing out their to help with this
>> conversion?
> 
> Should be:
> 
> decimal = degrees + minutes/60.0 + seconds/3600.0
> N,E are positive; S,W are negative.
> 
> But the above numbers don't match.

It is more complicated than that. For negative numbers the value is degrees -minutes/60. - seconds/3600.
And people always trip up on numbers that start with -00 :)

Cheers
  Tommy