I do have a portal fantasy where the characters are transported into a futuristic earth where humans have died off, magic has returned along with mythical creatures, and most of the world is flooded, leaving few land masses. I've been using flood map predictors to create that map.
map making is unnecessarily difficult 😅 so i feel you on that front!! i am also writing a portal fantasy with duel pov with magic and royalty!! i'm about 31k in and nowhere near done 😅
That sounds like such a cool way to make a map. I've tossed polyhedral dice on paper where each die represents something else (D4 = mountains, D20 = capital, etc) but nothing like you're talking about where you based climate and such off real places. That's too cool.
For my last map, i used a hexagonal grid and made shapes that I liked, cut and pasted them together on a larger sheet then made a cleaner version. Still tough but easier. I like closely you are using our world to inside your realms. You might want to look at scifi games that might have portals/time warps for their maps. I'm working on 2 projects a contemporary novella that is almost done, and a fantasy novel that is always in the planning stages.