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We're talking about serious Civ revolutioning here.
The city modelization in Civ always have been a representation (by a tile called "city"). And ressources around just stay as they are, + improvements. But look at New York and USA's East coast! Forests? Mines? Forget it. I guess there's nothing but the city between NY and Chicago or Washington. So it changes alot on many aspects:
- tiles (forest to city, plains to city, etc.)
- production (food's production isn't 30km outside NY's center...)
- unit moves (to a certain extent)
- moving troops on opponent's field
- attacks on city
- how the map looks
So I would propose a way to arrange this. Of course, it implies to consider the growth of production by science, which is what permits such big cities (enough food, etc.).
I would see possible to graphically simply show the city taking expansion, until it even reaches tiles around. Once a tile is touched, it is touched GRADUALLY, which means it will have only it's boarders with city, then more, more, more.... until its production is a entirely a city-type production (which will go up with the city beeing more dense/effective). It also means that the value of the center tile will see its value change through expansion (since it wont be only city form the beginning).
EDIT: It's not only about a graphical issue but mainly the gameplay issue that's important here. Presently, the geographical expansion of cities isn't in Civ 3.
The city modelization in Civ always have been a representation (by a tile called "city"). And ressources around just stay as they are, + improvements. But look at New York and USA's East coast! Forests? Mines? Forget it. I guess there's nothing but the city between NY and Chicago or Washington. So it changes alot on many aspects:
- tiles (forest to city, plains to city, etc.)
- production (food's production isn't 30km outside NY's center...)
- unit moves (to a certain extent)
- moving troops on opponent's field
- attacks on city
- how the map looks
So I would propose a way to arrange this. Of course, it implies to consider the growth of production by science, which is what permits such big cities (enough food, etc.).
I would see possible to graphically simply show the city taking expansion, until it even reaches tiles around. Once a tile is touched, it is touched GRADUALLY, which means it will have only it's boarders with city, then more, more, more.... until its production is a entirely a city-type production (which will go up with the city beeing more dense/effective). It also means that the value of the center tile will see its value change through expansion (since it wont be only city form the beginning).
EDIT: It's not only about a graphical issue but mainly the gameplay issue that's important here. Presently, the geographical expansion of cities isn't in Civ 3.
(at least, I think it was him 
) , came up with a graphics mod which turned all the railroaded tiles into suburban squares, and irrigated squares into farmhouses and barns and the like! It looked REALLY COOL!!!
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