That map just gave me those vibes I from the good old days when prototypes of video games were completely different from their final versions.
Like how they had 1 massive map for Super Mario World at first, which got redesigned into something else entirely, or Pocket Monsters 2 (which then become Pocket Monsters Gold and Silver) which was originally going to take place in all of Japan (with Kanto being heavily reduced in size too), and then they ended up with just the Chubu and Kansai regions with a little bit of Shikoku region for 1 town.