Fallback gdal_proximity command to native path

[sanmit99]

Following up to resolve proximity issue: #1854

I have added the native path of gdal_proximity and ran it in subprocess. additional check is passed as well to make sure the path exists to the gdal_proximity script.

[pierotofy]

Thanks for the PR @sanmit99 ! This is a good workaround, but I don't think it addresses the root cause.

It seems that this issue only happens with the GPU builds of ODM. If you run:

root@4d9e2ef9523d:/code# python3 -c "from osgeo import utils;print(utils.__file__)"
/usr/lib/python3/dist-packages/osgeo/utils/__init__.py

From the latest CPU docker image, it works fine. But doesn't in the GPU images.

For some reason, the osgeo_utils package does not get installed in the system path (/usr/lib/python3). Understanding why that is and fixing it should be the proper fix.

[sanmit99]

@pierotofy Yes indeed you are right, I had gone through osgeo util import import. utils itself wont import

python3
Python 3.8.10 (default, Mar 18 2025, 20:04:55) 
[GCC 9.4.0] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> from osgeo import utils
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
ImportError: cannot import name 'utils' from 'osgeo' (/usr/lib/python3/dist-packages/osgeo/__init__.py)
>>> 

Note: the container has gdal 3.0.4

And as per investigation going through gdal versions i found out utils were first introduced in gdal3.2:
https://github.com/OSGeo/gdal/blob/release/3.2/gdal/swig/python/osgeo/utils/gdal_proximity.py

Prior versions had it in scripts
https://github.com/OSGeo/gdal/blob/release/3.1/gdal/swig/python/scripts/gdal_proximity.py

[sanmit99]

@pierotofy Yes indeed you are right, I had gone through osgeo util import import. utils itself wont import

python3
Python 3.8.10 (default, Mar 18 2025, 20:04:55) 
[GCC 9.4.0] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> from osgeo import utils
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
ImportError: cannot import name 'utils' from 'osgeo' (/usr/lib/python3/dist-packages/osgeo/__init__.py)
>>> 

Note: the container has gdal 3.0.4

And as per investigation going through gdal versions i found out utils were first introduced in gdal3.2: https://github.com/OSGeo/gdal/blob/release/3.2/gdal/swig/python/osgeo/utils/gdal_proximity.py

Prior versions had it in scripts https://github.com/OSGeo/gdal/blob/release/3.1/gdal/swig/python/scripts/gdal_proximity.py

This problem is with gdal versions. if we can either force to have bare minimum gdal version or else we can handle like i have shared in PR.

:) hope this helps

[pierotofy]

Thanks for investigating. Upgrading GDAL could be tricky. I ended up just refactoring the solution proposed here by defining a fallback function for gdal_proximity instead.