Compass is an important tool for geomantic operation, and its basic function is orientation. When we know the knowledge of feng shui and regulating qi, we must first learn the basic method of compass orientation.
The scientific name of the compass is Compass, which was created in the era of Xuanyuan Huangdi. After generations of sages, according to the Book of Changes and the Heluo principle, taking into account the principles of the sun, the moon, the five stars, the seven policies and the operation of the stars, and then observing the undulating patterns of mountains, rivers and plains on the earth, it was revised and improved, and it was made to determine the orientation and survey the terrain. Most geomancers and sailors called it "compass" or "Luo Geng".
When it comes to the use of the compass, I believe it will take a lot of space if it is discussed in detail. Because it includes too many things, this article only talks about simple usage.
I hope my answer can help you.