Triangular system is a simplified magnetic anomaly interpretation system. In this paper, the expression of magnetic field of arbitrary independent shape model is given. Aiming at the undulating terrain, the technical support of “height tracking” and “bidirectional focusing” is designed to solve the
influence of terrain on the interpretation process. The rule of triangulation of arbitrary independent magnetic anomaly inversion under undulating terrain is given, and the principle and procedure of accurate interpretation are given. The hypothesis of a single magnetic anomaly with arbitrary shape is presented. In this paper, an example is given to explain different parts of the same anomaly, and an example of prospecting in the Rosemary area of Peru is given. The system of the method in this paper is new ideas and advances in inversion of magnetic data under potential terrain.
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