I'm utterly baffled as to how the names of buildings and such were left off of the map in DR3. I guess there's a smartglass map for the 'bone version, but for PC players, the map is pretty unhelpful. I started to work on labeling a map with the numbers as listed on the DR wiki, but I could tell even I wasn't going to ever want to refer back to it for anything... so I made this instead.
I'm not an expert programmer or anything, but I am working on a project in Unity and know enough about it that putting this together was a piece of cake. Hover over a building or lot to make its name appear. Zoom in and out with either the scroll wheel or the up and down arrow keys. Pan by clicking and dragging or with WASD.
Note that I didn't drop any hints as to where bosses appear, where to find improbable weapons, or where safe houses can be found. I liked the way the Willamette and Fortune City maps in the previous games still labeled and talked about everything as it was pre-outbreak, even when it came to stores that were coverted into pawn shops in DR2. It's a little tougher here because of all the boarded-up buildings, but I did my best. Hope it's useful!