Take a look at the automaps. You'll find them in intrface.crf.
The Page001a.pcx for each level is the 'Spatially Aware' map, with everything filled out.
The icons for rechargers and such don't appear on those maps as they are placed by the game based on the location of those objects.

[EDIT: Curse my brain for randomly deciding to write 'Specially' instead of 'Spatially']

* Nameless Voice  slaps himself around a bit with a sign saying "Thou shalt read your posts before hitting 'submit'" *

Yes, of course I meant Spatially Aware.