Ability to change the distance of a single unit on the map

It says that 1 unit means 100 meters in the map, but that is absolutely tiny when you are trying to make literal continents. Going from one major city to the next should take weeks, not hours. I'd like the ability to change the standard distance that a unit represents, and how long it takes to travel through one. This should be very easy to implement.

Ideally distance traveled would also depend on the speed of the characters, but that encroaches on the territory of traveling mechanics like marching order and stuff so I guess it's for a later time.

Nice job with the recent update btw.