[OSGeo-Discuss] looking for introductory material on cartography

[G. Allegri]

I'm going to teach a course (mostly as volunteer time) on GIS basics
and GPS surveying for an ONG in Africa. The first two days they will
self-teach cartography basics, then I'll begin from GIS, etc. They
asked me if I could indicate them some links to free introductory
material on cartography (earth shape, coordinates, maps, reference
systems, projections, etc.).
Does anybody know web resources, or could share copyleft
tutorials/manuals/etc on the subject? I've found something googling,
from wikipedia to some sparse course chapters, but I would like to
find structured, clean and easy, stuff. Am I asking too much?

Thanks very much,
Giovanni