AI Cities & Terrain: A Hypothetical Discourse

[St Leo]

How does CivII determine "fertility"? We know that it doesn't directly evaluate the production of terrains, but is it hardcoded or an invisible flag?

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St. Leo
http://ziggurat.sidgames.com/
http://www.sidgames.com/forums/

[C0ckney]

I have found that AI civs only found on terrain which produces 2 or more food without irrigation (i.e plains and grassland),

I think this is hardcoded but I could be wrong

err... plains don't produce 2 or more food without irrigation... but when you build a city on plains they produce 2 food because a city square is irrigated automatically