I installed Christoph Gohlke's prebuilt wheel Cartopy‑0.20.2‑cp39‑cp39‑win_amd64.whl using pip in an active virtual environment. The environment is using Python 3.9.5. When trying to import Cartopy I get the error message below. This used to work before and now it no longer works and I can't figure out why. Does anyone know what the issue could be or what I'm missing?
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ImportError Traceback (most recent call last)
Input In [4], in <cell line: 1>()
----> 1 import cartopy
2 import cartopy.crs as ccrs
3 import cartopy.io.img_tiles as cimgt
File ~\Downloads\GitHub\Project\venv\lib\site-packages\cartopy\__init__.py:110, in <module>
105 pass
108 # Commonly used sub-modules. Imported here to provide end-user
109 # convenience.
--> 110 import cartopy.crs
111 import cartopy.feature
File ~\Downloads\GitHub\Project\venv\lib\site-packages\cartopy\crs.py:27, in <module>
24 from pyproj.exceptions import ProjError
25 from shapely.prepared import prep
---> 27 import cartopy.trace
30 try:
31 # https://github.com/pyproj4/pyproj/pull/912
32 from pyproj.crs import CustomConstructorCRS as _CRS
ImportError: DLL load failed while importing trace: The specified module could not be found.
As mentioned by cgohlke in the comments, installing the wheels of shapely and pyproj from his website solves the issue.
If the libraries are already installed, use --force-reinstall to overwrite the existing installations.