Burramesh city map

[Rik]

This is my current map of the city which features in my other WIP - my science fiction novel. It needs some help.

The city is set in a tropical "jungle" on an alien planet. It's only connection with the rest of the world is by river. The technology is a mixture of modern and mediaeval - thus it has some electrical capacity and piped water, but no cars or mass transit systems. The better parts of the town are stone-built, while other parts rely on wood for walls and roofs.

The walls surrounding and dividing the city are primarily to protect the city from fire and riots (internally) and flooding (externally) - the river floods impressively following the spring melt in the mountains. The walls don't go all the way around - the northern section is protected by poisonous alien plan/animal "hybrids" I'm currently calling monkeyrats.

In the vague hope that I ever finish the first draft of the book (currently 92k words), I think a map of the city would be a good addition to the text. I drew this map in the Gimp.

I'd very much welcome advice on how to improve on what I've already got here. Ideally I want something stylish but not too fantasy, initially in colour but able to convert to black'n'white or greyscale, and easy to follow eg including text for the main streets and buildings. 3D would be ideal, but my artistic skills are, let's say, negligible.

Help?