[David603]

3) Sounds the most likely by far, but there is a really quite a lot more detail and more densely packed buildings in the SoW picture than in Cannon's map.

I think you may be overestimating Modders influence on Oleg though. While Oleg has taken on board information from modders, this tends to be because the people in question are very knowledgeable in a relevant subject, and take the time to present Oleg with a useful version of said information, rather than because they are modders.