How did they get that surveying Equipment into the dungeon?

One of our more enterprising players has been keeping an out-of-game log of pieces used for the dungeon and has produced this:

I guess I'm going to need a LOT more 4 length walls and a 7 foot table if i want to accuratly represent the Frozen Monastary in all its splendor....

Seriously though, I may just need to grab the illistrator files he used to whip this up. Very pretty.