I could import gdal without any problem in my main Python script with:

from osgeo import gdal

I could also use gdalwarp, gdal_translate with no issue. But when it comes to gdal_calc, I got the error:

Traceback (most recent call last):
File "C:\Program Files (x86)\GDAL\gdal_calc.py", line 51, in <module>
    from osgeo import gdal
ImportError: No module named osgeo

I have tried to find out if anyone had the same issue but found nothing.

(In case you need more info: I installed gdal following the instructions from https://sandbox.idre.ucla.edu/sandbox/tutorials/installing-gdal-for-windows)

  • 1
    How did you launch gdal_calc.py? If you open the OSGeo4W shell and just write "gdal_calc" into the window it should run a batch file "gdal_calc.bat" that takes care of setting the environment for you.
    – user30184
    Oct 28, 2017 at 12:52
  • I called gdal_calc by using: os.system(command). With command is a string has the same format as: gdal_calc -A input1.tif -B input2.tif --outfile=result.tif --calc="A+B"
    – Kevin
    Oct 28, 2017 at 12:58
  • Gdal_calc is itself a python script while gdalwarp and gdal_translate are executable programs. Probably that makes the difference.
    – user30184
    Oct 28, 2017 at 13:20
  • So any suggestions?
    – Kevin
    Oct 28, 2017 at 13:32
  • I suggest to read python manuals or stackoverfow. For example stackoverflow.com/questions/1186789/…
    – user30184
    Oct 28, 2017 at 13:47

1 Answer 1


Comments are correct - gdalwarp, gdaltranslate etc. are running as EXEs sourced through your path variable - they are successfully importing the gdal and other modules, but via DLL files they reference (as opposed to the osgeo Python specific folder/module).

Depending on your installation, you should have either a GDAL or OSGEO folder that contains a sub-folder named "apps" - this is where these programs got placed on my install, anyway.

The "gdal_calc" command is calling the python script of the same name - line 51 in that is referenced in your error message (from osgeo import gdal).

To fix this, find out which "osgeo" folder has the Python modules (there are likely several folders with the name osgeo) - do this by finding the one that has the "init.py" file inside it. It should also have a "gdal.py" file, "ogr.py" file, and a "_gdal.pyd" file in there too. This osgeo folder is the most important, because it is the Python module from which you can import gdal, ogr, and osr.

Go into System->Environments... and either add the folder ABOVE the osgeo module to your Path variable, or else include the following command in your script, and it should run fine (note that the module here is where it appears on my system, yours will be slightly different):

import sys
sys.path.append(r'C:\Program Files (x86)\GDAL\gdal\python')

Then your os.system('gdal_calc...') command should run fine. But with the environment variable change, it'll be permanent and you won't have to manually repath to those Python modules every time you need to use them.

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