Re: [Gpsbabel-misc] Garmin lat/lon co-ords to UTM?

[Gavin T. <ga...@re...>]

Hi Jean-Paul,

Unless I'm mistaken, all GPS communication takes place in WGS-84, so  
it is not possible to transfer co-ordinates from other projections  
without first converting them to/from WGS-84. This would require the  
use of software such as proj - which has been previously mentioned -  
to perform this conversion between UTM and WGS84 in the sending and  
receiving process. And would also explain why GPSBabel doesn't  
perform any projection conversions since all communication is in WGS-84.

Cheers Gav

On 5/05/2007, at 13:44, Jean-Paul Thuot wrote:

> On 5/1/07, Robert Lipe <rob...@gm...> wrote:
>>>
>>> I have a Garmin Legend, and I'd like to download waypoints into a  
>>> UTM
>>> format.  Is this possible with GPSBabel, or does anyone know of a
>>> batch converter that I could use?
>>
>> GPSBabel supports a number of formats that use UTM.     Which one
>> specifically are you interested in?   It's not very popular in the  
>> land of
>> electronic maps; it made much more sense on paper maps when you
>> were dealing with small enough tiles that it made sense to distort  
>> them
>> enough to consider that slice of the world flat (ish).
>>
>
> Hi Robert,
>
> Sorry to trouble you, but I would be most appreciative if you could
> point out which formats that use UTM are supported by GPSB.  I found
> one so far, Textual Output, that has UTM tucked away inside it, but
> what I would LOVE is to be able to both read waypoints from my Garmin
> Legend in UTM, and to SEND UTM co-ordinates to the Garmin somehow.
>
> Thanks for all your help so far.
>
> Jean-Paul