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

[Peter D. <p....@uq...>]

Jean-Paul Thuot wrote:
> Hello all,
>
> 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?
>
> Thank you in advance,
>
>   
I've done this using the program proj from 
http://www.remotesensing.org/proj/ like so

gpsbabel -i garmin -f com1 -o xcsv,style=pta.style -F - | proj -r 
+proj=utm +datum=WGS84 +zone=56 +south

where pta.style outputs lat lon alt description separated by whitespace
The output from the pipeline will be east north alt description
(proj passes through unchanged the rest of the fields beyond the first two)

You can probably install proj from your package manager on linux.

As an example of the power of connecting proj to gpsbabel, I wanted to 
upload the coordinates of some points that I have on Australian Map 
Grid.  This requires a datum shift to UTM then a conversion to Lat,Lon. 
The original file was in the format 'east north alt name'.

#!/bin/sh
ifile=$1
gawk ' {print $1, $2}' $ifile |    #pipe easting and northing into converter
cs2cs -s -I -f "%.6f" \
       +proj=latlong +datum=WGS84 \
       +to +proj=utm +south +zone=56 +ellps=aust_SA \
       +nadgrids=QLD+0900.gsb |
paste - $ifile|
gawk -v OFS="," '{print $1,$2,$7}'|      #at this point $7 has the name 
of the point
gpsbabel -i csv -f - -o garmin -F com1


This is probably more likely to confuse than help :-[

regards and thanks for a great tool

Peter Dean

ps I am using gpsbabel mainly on cygwin on windows xp
proj is available as a standard cygwin package