I'm testing MapProxy (1.12.0) on a Windows Machine and followed each step from the "Installation on Windows" docs. I have a running virtualenv, used pip to install MapProxy and PyProj.

The command pip list shows

MapProxy   1.12.0
Pillow     6.2.0
pip        19.2.3
pyproj     2.4.2.post1
PyYAML     5.1.2
setuptools 41.4.0
Shapely    1.6.4.post2
wheel      0.33.6

A simple mapproxy-util --version fails with the following traceback:

(mapproxy_venv) \mymapproxy>mapproxy-util --version
Traceback (most recent call last):
  File "\python\Lib\runpy.py", line 193, in _run_module_as_main
    "__main__", mod_spec)
  File "\python\Lib\runpy.py", line 85, in _run_code
    exec(code, run_globals)
  File "\mapproxy_venv\Scripts\mapproxy-util.exe\__main__.py", line
5, in <module>
  File "\mapproxy_venv\lib\site-packages\mapproxy\script\util.py", l
ine 28, in <module>
    from mapproxy.script.conf.app import config_command
  File "\mapproxy_venv\lib\site-packages\mapproxy\script\conf\app.py
", line 32, in <module>
    from .sources import sources
  File "\mapproxy_venv\lib\site-packages\mapproxy\script\conf\source
s.py", line 17, in <module>
    from mapproxy.srs import SRS
  File "\mapproxy_venv\lib\site-packages\mapproxy\srs.py", line 26,
in <module>
    from mapproxy.proj import Proj, transform, set_datapath
  File "\mapproxy_venv\lib\site-packages\mapproxy\proj.py", line 262
, in <module>
    raise ImportError('could not find libproj or pyproj')
ImportError: could not find libproj or pyproj

Any ideas what went wrong? PyProj import and functions are working, tested that in the python console.

  • 1
    I have the exact same problem. Does it work in earlier versions?
    – Stefan
    Dec 5, 2019 at 15:37

2 Answers 2


My guess is that your pyproj is too new. I reinstalled my setup on a different computer and had to roll back all the way to pyproj 1.9.6.

I haven't dug deeper into it, but i think that pyproj has renamed something, as it is the line:

from pyproj import Proj, transform, set_datapath

that throws an exception.

After changing to pyproj 1.9.6 it works. In order to do that I also changed to python 3.7 as I'm lazy and wanted to use a precomiled package.

  • Thank you very much, that was the problem. MapServer should update their docs or the code...
    – baal
    Dec 9, 2019 at 9:42

To add to Stefan's answer and Baal's comment, I needed these additional commands to make proj 1.9.6 available. (Confirming his suggestion was my issue too) The Make and GCC stuff wasn't obvious to me when I started doing this - in case any of you attempting MapProxy are linux noobs like me :)

sudo pip3 install wheel
sudo pip3 install setuptools
sudo pip3 install pyyaml
sudo dnf install gcc make
sudo dnf install python3-devel
sudo pip3 install 'pyproj==1.9.6'

Now I get this:

[me@localhost ~]$ mapproxy-util --version
MapProxy 1.13.2
[me@localhost ~]$ 

One More thing: If you are like me and testing with a headless VM, with no browsing capabilities, the binding made when doing this is to a 'localhost' host header:

mapproxy-util serve-develop mapproxy.yaml

This method doesn't allow someone from a different IP (my actual OS vm) access to the server. You may need this:

mapproxy-util serve-develop mapproxy.yaml -b <vm-ip>:8080

Now it works. :)

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