Docs: add cookbook-style docs on static maps/DEM data support.

[alshan]

Possible sources of inspiration:

• https://github.com/royalosyin/Work-with-DEM-data-using-Python-from-Simple-to-Complicated

[alshan]

More @egayer suggestions :

We could imagine plotting earthquakes locations and intensities dowloaded from the USGS website (https://earthquake.usgs.gov/earthquakes/search/). Such exemple would show how to proceed with a pandas dataframe. On top of that, we could also plot Japan Regions Shapefile Data which are free at https://map.igismap.com/gis-data/japan/administrative%20region%20boundaries (I don't know if you will have the same concerns as with my previous example for distribution) to show how to use a geopandas dataframe on top of a raster.

[IKupriyanov-HORIS]

More examples: https://kodu.ut.ee/~kmoch/geopython2019/L4/raster.html https://kodu.ut.ee/~kmoch/geopython2019/L6/examples.html