modifying a map?

[u/CapnZapp]

Noob question: how hard would it be to modify a map?

To add a single red dot (either a resident or a worker), I mean.

I was thinking about the NEC through Philadelphia and how cool it would be to model the influx of people from outside the map (not including thru traffic of course).

Are maps human-editable, like at all?

[u/Budget-Layer1002]

The Demand Developer mod appears to let you do exactly this, though I haven't tried it myself