That's incredible. You've got to love such attention to detail. I wouldn't mind having that on my wall, and if he's looking for a new project; perhaps a similar one of Europe?
I love maps, doesn't matter if they're real or fantasy. Just this afternoon I was ogling the map that came with my premium edition of The Witcher 2. Having a map just makes it seem more real, that there is more to the world than the parts you see in the game. Same thing with real world maps; I know the USA is a real place, but having never been there it's not very concrete in my mind. But looking at a map like this and seeing the state lines and mountain ranges, rivers and roads, cities and towns, and realising it's all really there; it's just fascinating.