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:
[email protected] 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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