(unknown)

[Gabriel Genellina]

En Mon, 16 Nov 2009 11:11:20 -0300, Tommy Grav <tgrav at me.com> escribió:
> 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
>>
>> 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 :)

I set the sign of the result *after* computing it, so it doesn't matter.

py> 39 + 42/60.0 + 36.3/3600
39.710083333333337
py> 77 + 42/60.0 + 51.5/3600
77.714305555555555

Either the example above is incorrect, or there is another thing involved.

-- 
Gabriel Genellina