Since many placements explicitly reference other placements via distance rules, it is important that the order of placement is logically consistent. The order is determined by world_definition.js, which is outside the scope of this document. Typically, the order goes something like:
1. center places in the center of the map, every time;
2. Well of Fate places some radius away from the center;
3. Every other biome places;
4. Villages/POIs/bases in whatever order you like