Resolve geospatial example cartopy installation

[seanshahkarami]

The geospatial example seems to have worked on the contributor's (@mgrover1) machine, but I can't get cartopy to install on my M1 MBP.

For future reference, my pip install fails at:

      lib/cartopy/trace.cpp:767:10: fatal error: 'geos_c.h' file not found
      #include "geos_c.h"
               ^~~~~~~~~~
      1 error generated.
      error: command '/usr/bin/clang' failed with exit code 1
      [end of output]
  
  note: This error originates from a subprocess, and is likely not a problem with pip.
  ERROR: Failed building wheel for cartopy
Failed to build cartopy
ERROR: Could not build wheels for cartopy, which is required to install pyproject.toml-based projects

[notice] A new release of pip available: 22.2.2 -> 22.3
[notice] To update, run: pip install --upgrade pip

I'll look into this later.