Also there stuff on the Common Sheet (shouldn't be any thing there). I would go thru each of the sheets and make sure what is on each is what is supposed to be there. Hide all of the sheets, then show each sheet separately. If something is out of place move it to the correct sheet as you go. Checking the layers the same way could be a good idea as well.

Monson, Thank you, I did not know that, I have been procrastinating on building symbol files from them.

I posted some new maps, this time Cosmographer. The maps are some of the maps for a Traveller adventure called "Deep Shadows" (which I did not write). The original was written with ascii art. Also the adventure is posted in few places on the internet.

A thought, coming in to this late, is to check the flavor text in the Mistborn books by Brandon Sanderson. Which may point to some detail things to through in.

Volcanic dust on roofs, and roads for example.

Looking at your city it seems to me that it is big enough that I don't think I would put in all the buildings. I would put in the important ones but not all. Then make closeup maps of the areas that need it. So if your party goes to the "Inn of the Old Sign" but there is no combat in the area just put a dot on the map with a label. Does that all make sense?

Yes more symbols! A uncovered half-track, then one with the 3 American soldiers shooting from it. (a "The Dirty Dozen" reference)