APPLICATION THE FINITE ELEMENT METHOD TO COMPUTE REGIONAL MAGNETIC ANOMALIES IN THE MEKONG DELTA

Abstract

According to a traditional method the regional magnetic anomaly may be represented by the quadratic polynomial (or cubic polynomial) in the (x,y) coordinate. In this paper we used the finite element analysis based on the element shape functions (K. Mallick và K.K. Sharma, 1999) to compute the regional magnetic anomalies in the Mekong delta. In this technique, we used eight discrete magnetic values measured at eight nodes on the boundary of the rectangular element. The computation was implemented on a reference space then was translated into a real map space. The obtained results coincide with those of the method of least squares using quadratic polynomial with 4368 discrete magnetic values.