The Xconq world/area is a two-dimensional grid of fixed shape and size. You can treat it as representing part of a planet in space, and set up parameters simulating that, or just make it be itself and not address the question of the surrounding context. The appropriate choice depends on how much realism and complexity you need. Most computer games don't bother with this detail; for instance, a game set in an underground dungeon doesn't usually need to compute daylight, weather, or seasons. However, these same details may be very useful for games set outdoors.