Guess the Map IX: The Richese are no match

no ...

Hint ... Libya turned gray in 1965, and in 1998 they started considering moving to light blue, and in febuary the new government argeed to continue the move :)
 
Railroad width.
 
yep ... colored after which countries have which default track gauge on their public railways
 
Why should anyone know stuff about traitor states?
 
Hazarding a guess: Counties that voted to not secede in 1861.

...off to research, looking for a better guess...

This was NE Tennessee, not NW North Carolina- but does it have to do with the "state" of Franklin?

Or something about the High Country Council, whatever that is?
 
Hazarding a guess: Counties that voted to not secede in 1861.

...off to research, looking for a better guess...

This was NE Tennessee, not NW North Carolina- but does it have to do with the "state" of Franklin?

Or something about the High Country Council, whatever that is?

The state of Franklin is an interesting guess, but no. Not the High Country Council either, but it does have to do with mountains.
 
Something about the Appalachians?
 
Is it specifically about the Blue Ridge?
 
Counties where most rivers drain to the Atlantic vs. counties where most rivers drain to the Gulf of Mexico.
 
Really? 'The map is on Wikipedia' is now a clue?
 
Something to do with climate?

Yes! Since this is took a long time, I will give you credit for the correct answer. The detailed answer is Koppen climate classification (green is humid subtropical, blue is warm summer humid continental).
 
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