Cool, good you liked it. It took me long time to create it.
All cities were manually added, some had a little planning, specially those on that east metropolis.
The rivers were manually created too. The height map also had changes, specially on the beaches.
The west mountain, the highest place on the map, was created from a flat ground. The highest level was 3.
Some 'easter eggs' (curiosities):
Join Ville (Northeast) is the name of my city: Joinville.
Sweet Water (South) is the translated name of a city from my State. Água Doce.
Islanders (Northwest island), Mountain Hole (West), High Village (West) all got their names for the place where they are.
And I hope everybody likes the autobahn. What you all think about the 4-way cross?
I just noticed one thing, I've added oil rigs but 0.4.9 still don't have oil ships.

. Anyway next version will have.