Tiles
Dependent variable
Population growth
Productivity
Dependent upon
Level of technology, Government Policy
Population, Resources, Level of technology, Government Policy
Civilisation II terrain types:
Desert
Forest
Glacier
Grassland
Hills
Jungle
Mountains
Ocean
Plains
Swamp
Tundra
Possible additions to the above list:
Mountain plateau
Ocean shelf
Lake
Prairie
Savannah
Marsh
Boreal Forest
Mixed Forest
Conifer Forest
Tropical Forest
Rain Forest
Wetland Forest
Scrub Forest
Broadleaf Forest
Dunes (to distinguish from flat desert)
For more possible terrain types, see: http://en.wikipedia.org/wiki/Biome