在磁异常的解释推断中,较广泛地应用了解析延拓方法。人们为了了解剖面上磁异常的空间分布特点,经常把实测场值换算到上半空间或下半空间。然而,当位场在上延或下延过程中,边缘点将会受到损失,尤其在多次延拓后,边缘点损失更为严重。为了补救边缘点的损失,计算者往往利用异常曲线的趋势进行人为的外延,或者应用插值外推的办法来解决这一 Analytical extension methods are widely used in the interpretation of magnetic anomalies. People in order to understand the spatial distribution of magnetic anomalies profile, the measured field values ​​are often converted to the upper half or lower half space. However, when the field is in the process of up-down or down-time, the edge point will be lost, especially after multiple extension, the edge point loss is more serious. In order to remedy the loss of edge points, calculators often make use of the tendency of anomalous curves to make artificial extensions or use interpolation extrapolation to solve this