Did the first bottom left corner screen section of map and cleaned up all the extra extrusion faces underneath the map plane after I doing so. This is basically what I'll be tackling on a section by section basis. After I'll probably toss in some styling touches like I demonstrated a bit of in that last screenshot.
So far I'm pretty satisfied though with overall results it looks a lot like the way I originally envisioned it would in my imagination so it's pretty cool to see it really come to life a bit finally. I stumbled upon this too which was interesting to browse and read a bit on. Seems I went about it the right way more or less to transform it from 2D into 3D.
http://critical-gaming.squarespace.c...2d-3d-pt1.html