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Python library: Cartopy

Cartopy
Cartopy uses these libraries:

Installation: missing geos_c.h file

$ pip install cartopy
…
lib/cartopy/trace.cpp:767:10: fatal error: geos_c.h: No such file or directory
… #include "geos_c.h"
…

$ sudo apt -y install libgeos-dev
$ pip install cartopy

Segmentation fault

When I experienced a segmentation fault when running a script that called set_extent, the following solution (found in this StackOverflow answer) helped: 
pip uninstall shapely
pip install --no-binary :all: shapely

See also

The Python library geographiclib
Cartopy has replaced mpl_toolkits.basemap as it is now considered deprecated.
geodata

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