[Qgis-user] gps plugin

[mtnbiketrail at zzz.com]

I'm saying this is a bug with the gps plugin. I downloaded a couple of 
gpx samples off the Internet. All files show lat first, then lon, but 
the Qgis gps plugin reverses them; uses the lat as lon and lon as lat. I 
looked at the gpx schema and the files I used look like they conform to 
the schema.
Tom


Micha Silver wrote:
> mtnbiketrail at zzz.com wrote:
>
>> I used the gps plugin to load a gpx file, but it switches the lat and 
>> long around and so won't match up with my raster geotiff. The mouse 
>> pointer coords actually show -123, 41 instead of 41, -123.
>> This came from a garmin Mapsource generated gpx file.
>>
> The problems of "axis order"[1] are a real bugger. I didn't know that 
> Mapsource reversed the order.  Here's an idea how to reverse the order 
> of the Mapsource gpx files to get the lat and long correct:
>
> The proj4 utility cs2cs has a '-r' option to reverse x-y to y-x. But 
> to use it, cs2cs expects a simple text list of coordinates (not the 
> xml formatted gpx file). So you would first have to use gpsbabel to 
> convert like so:
> gpsbabel -i gpx -o csv <waypoints.gpx>  <waypoints.csv>
> Now edit that new csv file to *remove* all the commas. Then you can run:
> cs2cs -r +init=epsg:4326 +to +init=epsg:4326 waypoints.csv >> 
> waypoints_fix.txt
> And finally use gpsbabel again to revert this new waypoints_fix.txt 
> back to gpx format.
>
> It's pretty convoluted, but *might* work...
>
> Regards,
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