Howdy...
A big fan of your region! This is the most realistic I've seen here!
Have a link to maybe help you some... have you made any use of Google's excellent satellite coverage of the area?
Here is an example:
http://maps.google.com/maps?ll=53.558793,-113.603632&spn=0.005873,0.014453&t=h&hl=en
You can move that around and zoom in and out on almost the whole city... might help you with some building layout. Also there is pure map form, pure satellite form, then a hybrid form so you can find streets on the satellite shot.