Hey all,
Novice mapper. I came across this amazing town map. 14th c Trier. I assume that it was hand drawn in large format in pencil, scanned, then inked in a draw program. Then i think it was colored digitally. Can anyone point me towards appropriate tutorials? Is it photoshop? any guesses to how it is done? Thx.

URL:
http://www.nicherber.com/documentary
Navigate towards "Historical Reproductions"
Then scroll over to the "Graphical Reproductions."
There are a few examples of city maps. That is what I speak of.
Thanks so much

I have attached a downloaded image.
City.png