Change of coordinates between the nether and the overworld.

When traveling long distances in the nether, the player's location in the nether is passed directly to the overworld. For example, you are in the ubication 0 50 8000 in the nether and you want to return to the overworld, you make a portal to go to the overworld, but instead of being multiplied by 8 the coordinates, it just teleports you to 0 50 8000 in the overworld.