You know the Original Fallout 2 Worldmap is 1400x1500, or 4x5 'WRLDMP##' FRMs, each 350x300 pixels.
A Worldmap that would include Fallout 1 locations, based upon Lexx's design, is 2100x3000, or 6x10 FRMs. (Megamod presently uses a map that is 7x9.)
Modifying an actual satellite image of...