Lots of time has passed, but I was finally able to create an updated version of the Urbis map (click to enlage):



This is a lot more "bare bones" than the previous version - but it was made entirely with Inkscape, which allows me to update it a lot more frequently. You can download the SVG file from which this bitmap was generated here.

Note that almost all locations on this map have a corresponding entry in the Urbis Wiki.