Handling cartopy projections with Geopandas

[Beauprel]

Geopandas and Cartopy don't mix particularly well: when plotting a GeoDataFrame with df.plot(), which allows to automatically plot a column using a colormap, some cartopy projections are not displayed correctly on a matplotlib.ax.axes instance with a cartopy projection.

For our current applications, most projections we use are okay, especially when the extents are narrow (i.e. not the whole globe). Nonetheless, if this becomes a problem, we have the option of using ax.add_geometries() to plot the shapefile with colors using a method like in https://ipython-books.github.io/146-manipulating-geospatial-data-with-cartopy/.