Love it! Yes, some serious organisation needed to get all those in there like that.
I used to look at these maps when I was a kid- the contour ones, and got a strange pleasure form it heh. My grandad had an old Times map of the world on his wall. I remember looking at that with interest (my grandad had served in WW2 and had been around a bit)- I must have been 3 or 4. Yes, I can still remember it. It takes some doing to get all of that info in there and still make it readable!