I've been planning this feature for a while but only now I did it. I realize the cities of this game look quite similar (except for different colors and some random details) so navigating these - sometimes very big - cities would be a pain without any map.
So this is what the pause-menu will look like:
I will do a colormap as well, explaining what each color means. That, or specific icons for each building type.
Obviously I'd have to also create a pointer showing where you are on the map, but that needs some planning.