This is amazing. I really like the overall layout and how the canal circle through the High City. I imagine that this could be a great setting for a book or a rpg. Love it.

But before you call it finished I would like to add my two cents. First, have you considered any outskirt settlements? I don't know how it usually looks outside Arabic cities (pardon me if I'm wrong), but I would expect that for such a large city, there would at least be some colonies where the rivers enter and exit the city. Second, I think you should make the numbers on the map a little larger again. Not as large as they were, but something between the two. The details on this map are so elaborate that right now the numbers blend into the map and almost disappear.

Cheers