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OSGeo4w and python

B

bmart

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unitedstates
Hi all,

After a bunch of experimenting and searching around, I'm a bit stuck getting the gdal tools that work in concert with python to function properly. Specifically, I'm trying to retile a GeoTiff using gdal_retile.py.

I have no problem using gdal tools to warp imagery or add or remove metadata. I regularly create mosaics of smaller tiles and and translate them between projections using gdalwarp and gdal_translate, but the functions that require python support are causing me problems.

From within the OSGeo4w command prompt, I have tried beginning the command with "python gdal_retile.py..." This results in "python: can't open file gdal_retile.py: [Errno 21] no such file or directory"

I have also tried switching to python from the OSGeo4w command prompt, and beginning the gdal_retile.py command string there. In this case, I get an invalid syntax error.

There is plenty of talk online about getting gdal tools to work with python, but I'm afraid they all assume a basic level of understanding of python that I simply don't have.

Has anyone had an experience similar to mine? Are there any OSGeo4w users here that could point me to some helpful literature or who could possibly determine which steps I've messed up?

Thanks a lot!

bmart
 
I wonder if you could open the script using the IDLE GUI window.

Do the tools work under Python 2.7 or Python 3.3? The syntax is QUITE different between versions.

I am a python beginner, but that would be where I would start I think.
 
Hi,

Did you start the OSGeo4W shell? In that case you should be able to just type gdal_retile (without calling python first).
 
arno said:
Hi,

Did you start the OSGeo4W shell? In that case you should be able to just type gdal_retile (without calling python first).
Click to expand...

Yes, I always enter the commands from the OSGeo4W shell. I'll post a screenie of what's going on. I'm thinking that either my syntax is bad or the python bindings are somehow screwed up.
 
I just now got it working. Thanks for your help, Arno and hcornea. I believe the problem was a simultaneous installation of python elsewhere on my machine which I may have at one point or another told gdal to search for. Uninstallation resulted in proper functioning of gdal_retile. If this is only coincidence, then the problem may have been that my syntax was wrong--I may have been issuing the command "gdal_retile.py" instead of just "gdal_retile". In either case, I'm on my way now...
 
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