If we move towards the north pole the water energy dominates. The same map is used but the strengths of the various energies vary. As we move to the Southern Hemisphere the situation is reversed. It is just natural to design the map in the following way. For areas on and near the equator it is the fire energy that dominates.
Fire energy comes from all directions in addition to the other energies.
The map that describes the basic energies that come from the eight directions is actually changing with the latitude. If the Ba Gua is considered the map of energies caused by the climate of a localized area then each locality will have its own Ba Gua. There will be an infinite number of Ba Guas instead of only two, one for the north and one for the south. The Ba Gua, viewed this way, is not all that we consider in feng shui studies. The Luo Shu is the location of the nine stars at different times.