duke o' york
It don't mean a thing....
Interesting, but entirely irrelevant to how much money you get per city. You could have a city of size 100 on all mountains and you'll only get a single trade arrow for the road you get automatically on the city square. You won't get any more arrows unless you build improvements (roads) or buildings (marketplaces, etc) or have terrain that gives you trade. Obviously this is an extreme example, but you get the idea. Population isn't the be-all and end-all of a good city.
In fact, city size is the deciding factor whether a city gets unhappiness at all levels, although it is a smaller city size for the higher levels.
In fact, city size is the deciding factor whether a city gets unhappiness at all levels, although it is a smaller city size for the higher levels.