Some civilizations have a starting bias, which affects the starting positions they get assigned on map generation. This is done so that each civilization can gain terrain that best benefits their abilities, infrastructure, and unique units. The bias is usually based on historical data.
Upon generation, the map is split into equal parts for each civilization that is in the game. Each civ starts far enough from the others so that they have enough space to grow. The exception is with the Māori, who do not get any land allocated to them. Civs' starting positions (that is, where their initial units are situated) will be distributed around the map according to their start biases. If a section has a lot of rainforest, it is likelier that Brazil will be placed there instead of Arabia. Start biases are ranked by tiers: the lower the tier, the stronger the bias. It is not guaranteed that each section will directly correlate with a civ, as the map generates without taking into consideration which civs are in the game.
|Civilization||Tier 1||Tier 2||Tier 3||Tier 4||Tier 5|
|Australian||Coast||Resources acquired through Pastures|
|Greek||Hills (except Snow)|
|Incan||Mountain (except Tundra and Snow)||Mountain (Tundra and Snow)|
|Korean||Hills (except Snow)|
|Resources acquired through mines (except Uranium)|
|Mapuche||Mountain (except Snow)|