在重磁资料解释的位场转换方法中，习惯用的高通滤波方法有i）垂向一阶导数；ii）垂向二阶导数，iii）向下延拓。目前许多人认为，对于后两种高通滤波来说，空间域的方法比频率域的方法效果好，其依据是：艾尔金斯和罗森巴赫的垂向二阶导数法以及积分插值向下延拓法，其表面现象是用这些空间域方法 In the magnetic field data conversion method, the usual high-pass filtering methods are i) vertical first derivative, ii) vertical second derivative, and iii) downward extension. Many people now believe that the spatial domain approach works better than the frequency domain approach for the latter two high-pass filters, based on the vertical second-order derivative of Elkins and Rosenthal and the integration interpolation down Extension method, the surface phenomenon is the use of these spatial domain method