Although the boundaries between geologic units with different physical properties are usually quite distinct, the potential-field anomalies associated with them are relatively smooth, particularly for deeper bodies. The terracing filter has been introduced to sharpen anomaly edges and to produce regions of constant amplitude between them, mimicking geologic units on a geologic map. The boundaries between the pseudogeologic units are defined by the zero contour of the Laplacian function. Unfortunately, this can result in the domains of terraced anomalies extending far from the original location of the causative body, producing an image that poorly represents the geology. I have determined that the use of the mathematical shape index of the anomalies, rather than their Laplacian, produces a much more geologically realistic result. The effect can be controlled as desired using a threshold parameter. I evaluate the benefits of the method on gravity and magnetic data from southern Africa.

中文翻译：

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一种改进的势场数据梯形算法

尽管具有不同物理性质的地质单元之间的边界通常是非常不同的，但与它们相关的势场异常相对较平滑，尤其是对于较深的物体。引入了梯形滤波器以锐化异常边缘并在它们之间产生恒定幅度的区域，从而模仿了地质图上的地质单位。伪地质单位之间的边界由拉普拉斯函数的零轮廓定义。不幸的是，这可能导致梯形异常的区域远离致病体的原始位置延伸，从而产生的图像不能很好地代表地质情况。我已经确定，使用异常的数学形状指数（而不是其拉普拉斯算子）可产生更具地质现实意义的结果。可以使用阈值参数根据需要控制效果。我评估了该方法对来自南部非洲的重力和磁数据的好处。