| Jian Shuo, look here for a part answer to why North at the top. http://adsabs.harvard.edu/full/1948JRASC..42..233P I suspect the Polar Star had a major role. Also, if George is correct about the 4 winds then we reverse east and west north and south and we are back where we started from but upside down :-). Mahjong only reverses the east and west so we have a true mirror image! |
Why Maps in Shanghai are Upside Down?