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This reminds me a lot of the pdf titled Dawn of the Worlds. If you're interested in how that approached worldbuilding, it might be worth a look. Here is the address.

Very cool, I completely missed that one when I was searching for similar map making things.  Thanks for sharing!

You're welcome. I discovered it when scouring the Free and Homemade RPGS on the internet when it was huge almost 5-10 years ago.