The script sugests that the centra shelters were the most ancient ones.
Why are you being sarcasting this time Unknowns?
Well,let me try not to go unlogic here.
I think the FOLLOWING statements donīt violate logic.
I will define UC regions as regions which were never implied on the game that someone had ever crossed by foot.Some of these regions werenīt really possible to cross on foot.These ones I call GUC.Others were geographically possible to cross on foot.These I call SUC.Examples of SUC were the underwater tunnel of Balamb,the Galbadia side of the Horizon bridge,the Trabia Crater(I think we can consider this one a GUC on some sence).The opposite of a UC region is a NUC.
Hypothesis:The lines on the hexagonal shape were holographical walls worldwide.
First argument:The panel was inside of the holographic wall and it has functions related to the holographic wall.
Colorary:If there is a system of holographic walls then the walls canīt pass on places our characters cross on foot.Otherwise they would touch the wall.Our characters pass on all NUC places.So if there is a system of holographic wallīs they must pass on UC regions.
What about vehicles?
Additional information:The Ragnarok pass through holographic walls.
Sub arguments:The world map is not drawn at scale but it needs internal consistency.
On FF8 we see that the technology of passing through this wallīs exist.
This makes it possible to had the holographic wall system (HWS) worldwide.
Second argument:Taking the previous conditions into consideration one sees that the hexagonal shape can easily fit the world map.It could not fit any other map.