[Qgis-user] gdal_merge - GDAL Tools plugin Qgis error message

[Giuseppe Sucameli]

Hi William and Sergio,
I don't have a Mac, so could you do further tests?

Try to set the path to your GDAL python mods in the "path to GDAL binaries",

then exec a python tool from the Raster menu, e.g. polygonize or merge.
AFAIK on OSX the path to python mods should be similar to
/Library/Frameworks/GDAL.framework/Versions/1.7/Python/

Does it work now? If no, restart QGis and to execute the tool again.
What's the test result?

Cheers.

On Tue, Sep 28, 2010 at 6:53 PM, William Kyngesburye
<woklist at kyngchaos.com>wrote:

> That works.  What I'm saying is that as run from Qgis the GDAL python
> scripts are not getting an environment.
>
> It's possibly because of the way OS X applications (as opposed to shell
> programs) operate - they get nothing from the shell environment, so it makes
> sense that other programs (even shell programs) started from an application
> also get no environment.
>
> Maybe GDAL tools needs a PATH (at least for Python) setting?  There is a
> "pymod path" in the settings, but it's currently disabled, and I don't know
> if that's the right option.
>
> Or Qgis needs to try to get environment from a Terminal somehow for use by
> helper programs?
>
> On Sep 28, 2010, at 11:31 AM, Giuseppe Sucameli wrote:
>
> > Hi Sergio,
> > it seems that env was unable to find python.
> >
> > Try to open a shell and write:
> > /usr/bin/env python --version
> > What's the output?
> >
> > Cheers.
> >
> > On Mon, Sep 27, 2010 at 10:35 AM, sergio sevillano <
> sergiosevillano.mail at gmail.com> wrote:
> >
> >>
> >> El 14/09/2010, a las 17:13, William Kyngesburye escribió:
> >>
> >>
> >>> On Sep 14, 2010, at 9:55 AM, sergio sevillano wrote:
> >>>
> >>>> El 14/09/2010, a las 14:52, William Kyngesburye escribió:
> >>>>
> >>>>> What other GDAL tools have you used that work, besides gdal_contour?
>  gdal_merge itself is a python program, while gdal_contour is a binary.  It
> seems that an external python script is having problems finding python
> >>>>>
> >>>>
> >>>> other .py won´t work either
> >>>>
> >>>
> >>> I get this also.  I'm using the standard Qgis.
> >>>
> >>> My guess is that external python scripts aren't getting a shell
> environment so they can't find python, even though Qgis extensions run thru
> python.  Those GDAL python scripts all have the standard shebang:
> >>>
> >>> #!/usr/bin/env python
> >>>
> >>> Someone with a better understanding of this needs to comment so I can
> try to figure out why the Mac build is not working (while from lack of
> reported problems it seems other systems work).
> >
> >
> > i have tried to start all over
> > as i had my system very messy (flink, darwin, several pythons...)
> >
> > so i formated my hdd and start with a clean OSX
> >
> > i have tried standalone Qgis and standard Qgis, neither worked.
> >
> > in the standalone i have followed instructions to tell Qgis where is GDAL
> is
> > (inside the app) but the alias method did not worked
> > i could not select the desktop alias into the app through the GdalTools
> config.
> >
> > when i try to merge dem files with the standard build,  i get again:
> >
> > "env: python: No such file or directory"
> >
> >
> > until someone with "better undersanding" comes
> > i may try older versions or options, any hint?
> >
> > is there any older version of Qgis that works
> > in an intel mac with SnowLeopard (OSX10.6.x)
> > that has a working GDAL plugin ?
> >
> > William, i can do tester work if its useful to you,
> > thanks for your builds
> > i could have not get Qgis working at all without them.
> >
> > sergio
> >>
>
> -----
> William Kyngesburye <kyngchaos*at*kyngchaos*dot*com>
> http://www.kyngchaos.com/
>
> The equator is so long, it could encircle the earth completely once.
>
>


-- 
Giuseppe Sucameli
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