本文认为在地磁图中,由于观测点数量与分布不均匀性的局限,不少异常仅由少数几个点控制,成图后有些异常的形态与范围均有一定程度的歪曲变形。这样,仅用从地磁图中提取的大地磁异常解决深部地质问题,对解释效果会产生不良影响。为进一步扩大地磁图的应用范围,希望今后编制出版正常磁场图和能够反映深部地壳引起之区域异常的大地磁异常图。 This paper argues that in geomagnetic maps, due to the limitation of the number and distribution inhomogeneity of observation points, many abnormalities are controlled by only a few points, and some abnormal shapes and ranges after the mapping have some distortions. Thus, the resolution of deep geological problems using only geomagnetic anomalies extracted from geomagnetic maps will have an adverse effect on the interpretation. In order to further expand the scope of application of geomagnetic maps, it is hoped that normal magnetic field maps will be prepared and maps of geomagnetic anomalies that can reflect the regional anomalies caused by the deep crust in the future.