Basemap import error in PyCharm — KeyError: 'PROJ_LIB'

For Windows 10 with Anaconda + Python 3.71 (and I'm sure other Python 3 versions and Windows 7/8), you can tell Basemap where Proj4's "epsg" file is to succeed. I don't have an "environment" or whatever because it's too much work to figure out - so I didn't have an anaconda\share\proj area (as far as I could discern why I didn't have it).

But, what Basemap wants is the file "epsg", search the Anaconda directory for it with Windows Explorer. If it doesn't find it, install Proj4 by opening the "Anaconda Prompt" and typing in:

conda install -c conda-forge proj4

If it finds it, it should be in something like:

C:\Utilities\Python\Anaconda\Library\Share (it's where mine was, as well as \pkgs\ places where I guess it puts the package itself - and those can work too if need be, I used them at first, but the library one should work through updates better (maybe)).

Use the following code before importing Basemap and it'll work. Sets the environment variable PROJ_LIB to wherever epsg is and then Basemap can be happy.

import osos.environ["PROJ_LIB"] = "C:\\Utilities\\Python\\Anaconda\\Library\\share"; #fixrfrom mpl_toolkits.basemap import Basemap

As a nice bonus, to get hi-res data of Basemap, which Anaconda doesn't include in the Basemap install to start, type into "Anaconda Prompt":

conda install -c conda-forge basemap-data-hires

Following mewahl's comment I've added to my .bashrc (I use bash):

export PROJ_LIB=/path/to/your/instalation/of/anaconda/share/proj/

and now basemap (and others work).

You have to set the path of Proj lib as in newer version , this path has been replaced. Write below two lines of code before importing matplot_toolkits

  ### For Window's Users      import os      os.environ['PROJ_LIB'] = r'C:\Users\XXXXX\Anaconda3\pkgs\proj4-5.2.0-       ha925a31_1\Library\share'

To find the path of Proj_lib , just search epsg and then copy this epsg file location and put in proj_lib .Your Problem will be solved.

  ### For Linux's Users  import os  os.environ['PROJ_LIB'] = r'/home/XXXXXX/anaconda3/pkgs/proj4-5.2.0-   he6710b0_1/share/proj'