an unanswered question

     Does the Earth have a top and a bottom? Is the United States naturally on the top half of a round globe, with Australia on the bottom, or is it only that way because the maps in current use were drawn by people from the "top half"?   Anyone standing on Earth would  be on the surface, meaning, of course, the "top". Each person standing on Earth would have an only slightly different view of  the universe spread in all directions from himself , infinitely. But would each person perceive himself to be on "top" of the world? Does a person at the North Pole feel that he is at the "top" of the world? Or should we save that expression as a synonym for euphoria?