The World is upside down

In my approach the World is seen as a Graph, that means if you draw it
on paper ( a square) the upper left corner has the coordinates x = 0 and
y = 0, while the bottom right corner has the max accepted values. This
doesnt explain (maybe i dont understand it..) why WEST is on the right
and EAST on left... I guess it doesnt matter how you call the
directions