东E/西W/南S/北N/东北NE/东南SE/西南SW/西北NW
各个方位的英文全称是:east west south north northeast southeast southwest northwest 所以用字母来表示八个方位,就是以上英文的简写:E/W/S/N/NE/NS/SW/NW
eastwestsouthnorthnortheastsoutheastsouthwestnorthwest
E/W/S/N/NE/NS/SW/NW