This must vary a lot worldwide. I've always seen them with the wall the map is placed on representing 'up', which makes sense when you are looking at in a hallw

This must vary a lot worldwide. I've always seen them with the wall the map is placed on representing 'up', which makes sense when you are looking at in a hallway, because then 'left' on the map is also left in actuality (and 'right' obviously right).