I'm flattered and all, but just to reiterate, this graphic was made by someone else (ahenobarb). I just inserted it into the Conquests file. The orginal civ terrain file was a different shape. Just something that needed to be done.
Roi: it goes into Conquests/Art/Terrain.
Yeah it is a little weird that towns would be on hills and mountains. But it doesn't look that weird, so whatever.
The reasons I like the town over the mine are:
1 - it looks much better overall.
2 - the basis of productivity in society is not just resource exploitation (mine), it is mostly the concentration of population (town). This is obvious today but I think it applies to all periods of history.
It should be noted that Civ doesn't directly represent urbanization, even though it is a driving force of history. So, the town graphic makes people like me feel better about that.