Map for building

So this is a map I made with WorldPainter that I'm going to build a big city on. I tried to make it as realistic as possible. The question is: What should I improve on in this map? Write in the comments what you would want to see or what types of maps you want and i'll make it.
WARNING: Once you exit the pass the border of painted terrain Minecraft will load chunks normally, so there might be a sudden end. So stay away from the edge of the map if you want to build something.

Anyway if you build something using this please say that I made it...
Sorry the picture won't upload (Don't know why) so I will have to tell you what is in this:
Baches, Harbour lined with stone with canals a lake, river and snow capped mountains. Basically the whole map is flat.