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在地形起伏大的地区进行重力测量，所得重力异常中包含了和地形线性相关与非线性相关的干扰异常。后者来源于布格改正前最大地改半径之外的物质，它们是引起山形异常的主要原因。对此，本文提出了通过地形延拓法消除假异常的校正方案。实际资料处理说明长期未解决的山形异常问题得到了较好的解决，山形异常已基本消除干净。
Gravimetric measurements are conducted in areas with large undulations, and the resulting gravity anomalies contain disturbances anomalies that are linearly and nonlinearly correlated with the topography. The latter comes from the largest radius before the Bouguer correction material, they are the main cause of Yamagata anomalies. In this regard, this paper proposes a correction scheme to eliminate false anomaly by topography extension method. The actual data processing shows that the unsolved problem of Yamagata anomalies has been solved well, and the abnormality of Yamagata has basically been eliminated.