The one in his post is from a client with map gen probably. It takes all the minimap files you get in game and strings them together into a whole. The one he linked to was of course just screenshots. And yeah, the endgame is pretty much being sodom if you want to boil it down to its essence. Being the "superpower," the guys with the biggest guns. Being one of the very few groups who doesn't have to worry about the next city up the food chain or the next insanely boosted raider punching down their walls and killing and robbing them all

EDIT: And the skull is the symbol for a village. It shows up on your minimap ingame wherever there is a village idol.
btw the football field is very nice, although now you've got to go and brick it back over with white hehe.