Been looking online everywhere and I can't figure out how, I've seen multiple games have similar maps to this. if someone could help I'd appreciate it.
The city is procedurally generated and in this particular case, it has been worked on manually afterwards. If not manually than by an AI system, that has used the data from the original. The tool I linked you in the first reply is the originator of the city map itself, as the style is pretty obvious. The trees and the farmland are manual additions/changes imho but I do recall that there are several sub-parts to