first let me start of by saying that i like your map, aside from the fields.
it is well crafted and nice to look at. I do however have some concerns or thoughts

the wall is huge it looks as thick as the great wall of china.
the town is laid out like a sparsely populated gated community/subdivision
on a disney lot somewhere.

now I am making a few assumptions here but one would think that a town in a dangerous fantasy world would need to conserve resources even more than historic medieval towns did in our world. so to that point medieval towns were densely populated with houses butting up to each other and very little yard space.

this was because they needed to fit the maximum amount of people in a small space because building walls and towers to protect them was quite expensive

but then again this is a fantasy map and I am probable being to critical
http://www.lifeinitaly.com/tourism/map.asp?cityid=25

here are a couple of links illustrating my point

http://www.maps-charts.com/images/22...1560%20(a).jpg
http://www.estonia-travel.co.uk/Images/1_Tallinn.jpg
http://www.romizi.com/pan11.jpg
http://www.teachnet.ie/mmorrin/castle/images/map1.jpg
http://www.hullwebs.co.uk/content/i-...p-medieval.gif

well life intrudes so adieu