用于计算位场数据的一阶或二阶水平方向导数，一般水平导数用于边界的识别。-The data used to calculate the potential field of a first-order or second-order horizontal directional derivative, the derivative of the general level of identification for border.

根据位场数据的有效性，采用地球物理重力勘探方法对地下异常体进行边界检测,-According to the effectiveness of potential field data, the use of geophysical gravity anomalies of the underground exploration methods for boundary detection,