This is great! Thanks for sharing it. I'm a fan of big battle maps, mostly because I use them in a skirmish game (on VTT) where the virtual size is up to 96x48 squares, representing a 4' x 8' game table.

cheers,
Meshon

Edit: Having had a closer look a the full size map, it strikes me that you could make it a bit messier! You've got some discrete piles of debris there, but right now it does look like the inhabitants might be sweeping it clean on a regular basis. Of course, that's allowed...