These are the maps that are currently being used.
Click on the minimap for high resolution maps. (Minimaps and high resolution maps may show different coverage.)
The 13 world maps currently in use were established in Build 106.
It appears that the only constant thing between different instances of the same world are the ground design and the location of buildings. The buildings themselves vary between maps and the trees and things also vary.
Value of maps: easier to find gods, once the maps are complete.
The minimaps were created by just taking a screenshot at normal zoom, then cropping it. The high resolution images were created by zooming all the way in (detailed) and then zooming out 2 clicks.
How to identify which map you are on: use the racetrack file, run around on the first road and find which map fits.