Holy cartographers, Batman!

That is insanely good and from an artistic perspective I have no critique whatsoever. The only thing that caught my eye is your mountains. It looks like there's shadows on both sides, and typically only one side (usually the one that gets less sun) would be the darker shaded side per what I'd seen from the original thread where the guy was giving youtube tutorials on it.

I guess it's possible, so doesn't really bother me per se, but maybe someone who's more versed than I could chime in here.

My only other thought is:Bravo!