Someone would determine the direction they are travelling by using a compass or a gps unit.
You will be traveling South West!
You would be traveling west if you were traveling from Georgia to Mississippi.
You would travel northeast.
west
west
west
Any direction between due west and southwest
you would be going from east to west
north west
north west
You would be heading west to Beijing, which is is northeastern China.
It could be East or West depending on which direction you travelled from Everest