[OSM-talk] gpx tool advice needed

[Rory McCann]

On 12/11/08 10:57, Tanveer Singh wrote:
> Hi,
> I have a lowrance GPS.
> This has the option of dumping data to SD card.
> What it will do is dump all the trails to SD card under 1 file <filename>.usr
> Then I use GPS Babel to convert usr to gpx.
> But this gpx is huge.
> Is there a way to extract just one trail out of this gpx data and keep
> the timestamps intact
> All trails have different names, and when I convert to kml I can see
> the tracks individually.
> Is there a way where I can do
> 1. Big .usr file to big .gpx file
> 2. Extract one track and save to a small gpx file which I can upload to osm?

You can do this with gpsbabel.

For example if you have track named "mytrack", then off the top of my
head, you can extract that track with this command:

gpsbabel -i mybiggpxfile.gpx -f gpx -x track,name=mytrack -o mytrack.gpx
-F gpx

More details are on the GPSBabel documentation:
http://www.gpsbabel.org/htmldoc-1.3.5/filter_track.html

Rory

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