Sorry, no clue about the maps either, but fond memories of IFR training on this electromechanical marvel. I still remember how the sounds changed when turning to different headings as the gears that moved the aircraft at the Center of the spider web of wires picked up speed. It also had a mechanical protrusion to the right which would track your progress with a china pen on a Perspex plate covering a map.
I am sure the geography is fictional, the mechanical constraints required navaids in the corners.
(Found this googling for Vista as I just found a small sales brochure.