How does the compass locate the geographical position?

The earth is a magnet, the geographical north pole is the south pole of the magnet, and the geographical south pole is the north pole of the magnet. The magnetic induction line of the magnetic field starts from the geographical south pole to the geographical north pole on the surface of the earth, but the opposite is true inside the earth. The small magnetic needle of the compass is influenced by the earth's magnetic field, so that the south pole of the small magnetic needle points to the geographical south pole of the earth. Just write "south" on the south pole of the small magnetic needle to indicate the direction.

Compass, known as compass, compass, warp disk, meridian disk, needle disk and geomantic compass in ancient China, is an indispensable and important tool for geomantic scholars to engage in comparable activities. Compass has many levels, complicated contents and profound principles, including white five lines of gossip, branches, solar terms, astronomical calendar and state. As the preface to the Interpretation of Compass says: "Compass contains the meaning of heaven and earth, dials the degree of the stars, observes the flow of mountains and rivers, and responds to qi with form, and the number is reasonable, all of which are dense, while both Yin and Yang are Ye Ji, so it is called compass because of its complexity and mystery."

The study of geomantic omen began several years ago, but there is a lack of in-depth research results related to compasses. There may be three reasons: first, the mind has concerns that it should not be studied or inappropriate; Second, it is really difficult to study the mystery of compass in depth; Third, there are research results but I don't want to make them public. So it is difficult for people to know its true face.