[Qgis-user] creating .gpx file strips out al the attributes

[Andre Joost]

Am 28.08.2012 16:40, schrieb M.E.Dodd:
> The 'save as' command in qgis seems to strip out attribute data when
> creating files of certain sorts such as .gpx and also gives problems
> with .kml where the markers are not identified with any of the
> attributes.  Are there any workarounds for these problems?
>
> More detail on the .gpx issue, it will produce a .gpx file if you
> select 'skip attribute creation' but if you don't select this then it
> fails with the error message: "Export to vector file failed. Error:
> creation of field tree_id failed (OGR error: Field of name 'tree_id'
> is not supported in GPX schema. Use GPX_USE_EXTENSIONS creation
> option to allow use of the<extensions>  element.)"
>
> It appears to be quite a helpful error message except that I can't
> see anywhere to "Use GPX_USE_EXTENSIONS creation option"
>

Well, just do as you are told:
Insert GPX_USE_EXTENSIONS=yes in the layer field, and the GPX creation 
works.

More about that here:
http://www.gdal.org/ogr/drv_gpx.html

HTH,
André Joost