I've done a
proof of concept. Just created some topographical maps (no political borders, no labels) with GMT and added simple HTML navigation. Below each map there are 4 arrows for movement, ⊗ to zoom in and ∴ to zoom out (only two zoom levels: 90 and 30 degrees). If this is going to work in a b&w screen the colour palette should be modified (not difficult, just a matter of re-running the scripts) and maybe the quality reduced, this is taking already 14MB, and I'd like to go down to 10 or 5 degrees resolution...
Anyway, the zipped HTML and images are available at
http://djelibeibi.unex.es/files/map.zip
Remember, this intended to be viewed in a browser, not in a portable reader (yet).