Originally posted by 80k
Yeti, thanks for clarifying that for me. for some reason, i was under the impression that more of a resource becomes available due to mining. Perhaps it's roads/railroads that make a difference? i seem to always have a problem with my supply of coal, so i'm always wondering how to maximize my supply of it, when i acquire it.
Ok. Some quick clarifications. There are several different types of resources:
Bonus resources: These are "local" resources. They *only* add extra goodies to a worked square in the city the square is in. These are things like wheat, cattle, and game. A square with a bonus resource will *cough* have bonuses to the normal stuff you'd get. This could be adds to either food, shields, or commerce (or a combination of the three). They have no effect on any other city.
Luxury resources: These are things that make people happy. Gems, Dye, and furs are examples of luxury resources. These resources also count as bonus resources for the city they are in, but they have another effect. If you connect the resource via a road or rail to your capital, you now gain the benefit of the luxury for your entire civilization (not just the city that owns the square). Any city that's also connected to your capital via a road or rail (later, harbors and airports) gains extra happy faces. A single luxury is sufficient to generate a quantity of happy faces, but you only gain the benefit of a single type (so even if you have 3 gems, you only get the happy effects of one). The extra's can be traded to other civs though.
Strategic resources: These are things that allow you to build specific units/improvments. Iron, coal, saltpeter... All are strategic resources. These also count as bonus resources for the city they are in just like Luxury resources do. All cities that are connected to the one with the strategic resource via a road or rail (later harbors and airports) can make use of the resource. If that resource is connected to your capital, then you can trade it to other civs just like the luxury resources. These work very much like the luxury resources. You only need one of them. The rest can be traded.
So. The idea of "maximizing" your supply of coal is flawed. You either have it, or you don't. A single resource is sufficient for an entire civilization. If you have cities that can't make use of the coal, it's not because you don't have enough. It's because that city isn't connected to the resource. Check your roads. If you're on a different continent, you must have a harbor in a city connected via a road to the resource and a harbor in a city connected via a road to the city you are looking at.
A good rule of thumb when building a civ is to always connect all of your cities on a single continent by roads. That way, any resource available to one city on that contienent is available to all cities. Always build at least one harbor on each continent that you have cities. That way every continent you have is connected to every other continent you have. As long as you do both of these, then all of your cities will always be connected to all your other cities. That's a very good thing...