In space, there is no up or down, right? So, whether the map is upside down or not should be viewer relative?

Most languages read left to right, top the bottom, so it would make since the relatively important stuff to you be at the top.

I was wondering what the orientation of the Earth is relative to the plane of the planets in the solar system. You normally see the Earth as basically North/South == Up/Down in pictures of all the planets but I don't know if that's actually true. Interesting thought.