位场向上延拓是用来进行区域场局部场分离的，但是上延距离都是工作人员自己定，不稳定性大，最佳向上延拓高度法可以得到一个合理的上延高度-Upward continuation of potential field is used for local area farm field separation, but the extension distances are given their own staff, great instability, the best upward continuation height method can get a reasonable extension of the height of the