It's an image of undifferentiated mud, and has nothing to do with any map that was ever used by any commander. Real operational maps clearly indicate elevations (and infrastructure), whereas on this map you can barely tell the Alps from the Amazon. Utter nonsense.
EDIT: Also, Roosevelt and the like probably never touched an operational map in their entire lives (Churchill probably did, having been an officer). If you're going for that perspective, clearly the mud-soaked look isn't the one to go with. As of right now, HoI2 map looks a lot more attractive than this.
EDIT2: And, in case you were wondering what it would look like if the map made any sense, this is it -
http://www.gamefaqs.com/computer/doswin/image/921175.html?gs=14
EDIT3: I hope it would be easy enough to change province textures to a single color with a mod, that would largely negate my objection since I don't care for textured maps in grand operational wargames anyway. I could also make it brighter, as to minimize the possibility of wanting to bang my head against the table in frustration at playing in a world of permanent twilight.
Well if its like the Rome map you will be able within reason mod any type of texture you can imagine.
If its like EU3 with little tiles masked into each other then it will be a lot harder because any strong contrast between the colors of different texture tiles will stand out like a sore thumb.
Unfortunately I see in the first screen shot of this thread what appears to be two similar tiles masked into another texture.