What are the symbolic meanings of Feng Shui compass?

Compass is also called compass, and there are other aliases such as compass disc, compass needle and compass needle. Take all-encompassing, latitude and longitude. Compass is an important instrument, which is widely used in astronomy, geography, military affairs, navigation and the location of houses and graves. It is the continuation and development of the compass, one of the four great inventions in ancient China. China ancient compass can be divided into coastal type and inland type. The coastal type is produced in Zhangzhou, Fujian and Xingning, Guangdong, and is used for navigation. The inland geomantic compass, mainly produced in Wan 'an, is used to determine the orientation and plane layout of buildings and tombs, which is called "back plate" in history.