What does earth dragon mean in Feng Shui?

In Feng Shui, the quality of the terrain is judged based on the direction of mountains, rivers and rivers. Good terrain is generally described as dragon veins. It is to describe good terrain as a dragon, that is, an earth dragon. When building a cemetery, the best location is on the dragon's veins, and the direction of the tomb is consistent with the direction of the earth dragon's body. Generally, a compass is used to measure the best direction. The direction of the tomb is the most critical. If the direction is not good, even if the tomb is located on the dragon's vein, it will directly affect the inheritance of the family line and promotion and wealth of future generations. When measuring, make sure the compass does not touch the ground.