SilentConfusion
Emperor
I think this is more of a bad choice of names, than a real mechanics issue. Sure you don't (in reality) need a mine in the city, but you do need some sort of processing facilities nearby to process the ore (purify/package/etc.) for shipment. I think if the 'mine' buildings (as opposed to improvements) were simply renamed '<ore type> processing facility' (so for example the BUILDING 'copper mine' becomes 'copper processing facility') it would clear up a lot of confusion.
I'll give you that. I think that would be the easiest solution for me.
So is this the ore line currently?
Reveal Ore --> Build Mine Improvement --> Build Ore Processing Facilty (formerly called "Mine" building) --> Build Ore Smelter (or have National Ore Smelter) --> Build Ore Smithing --> Build Units with Ore
Have I got that right? Which of those building require Ore in vicinity?
I agree that it is quite a long chain. I think that might be fine though because the heavy investment in metal making is rewarded with troops that are significantly better.