地形改正（terrain correction），指的是在每个测点上，为消除测点周围地形起伏对观测结果影响的改正。
本文给出了重力异常的变密度层间改正、变密度地形改正计算公式。
This paper has given the computed formulae of Bouguer plate correction and terrain correction with varying density.
求解异常电位的边界单元法对电测深资料进行地形改正，应用效果明显。
The topographic correction of the electric sounding data by the boundary element method for anomalous potential is discussed, and the significance effect is obtained.
通过地形改正数学物理模型的建立，提出了地形改正最大半径的选择方法。
As physics-mathematics model of topographic amendment is created, it have been put forward to selectmethod of largest radius about topographic amendment.
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