Really like the map - and the vector-like style you've gone with - I think that will make it really useful as a player aid that they can scribble on or colour code to mean things. My only thought is actually dependent on the setting a bit - I'm making an assumption from the RPG in the heading and the walled town with keep, etc. that its a fantasy setting. For me the grid structure that dominates the town just looks odd for a fantasy setting. I would have expected more of it to be disorganised, having likely gone through a more organic growth process rather than being a laid out town. Maybe the setting is a bit more organised than I'm thinking, or maybe it's not even a fantasy setting, so it may be entirely invalid, but thought I'd mention it.