Chunk Loading Apocalypse Rising?

Can someone give me ideas of how to create a chunk loading system? I am referring to the Apocalypse Rising game, where the game loads the part of the map you are in and when you get near the edge the game loads another part of the map only for your client so you do not have to waste resources on other parts that you are nowhere near.

I know how to make a loading screen to specific clients, so I tried to use that for a basis. The problem is that when I create a clone of the new section of map, I don't know where to parent the new map so it shows up on only the client that is near the map section's edge and no one else's (excluding the people that are already on the map)

Any points in the right direction would be helpful