作者指出了要实现磁偏角自动修正程序移植要解决的问题以及解决这一问题的途径。

The problems to be solved in transplanting the automatic modification program of magnetic variation and the methods for solving them are discussed.

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详细论述了磁偏角自动计算的原理，并提出了一种利用地磁图自动计算图幅磁偏角的新方法。

This paper describes the principle of computing map magnetic declinations, a new method of computing MMD is presented.

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详细论述了磁偏角自动计算的原理，并提出了一种利用地磁图自动计算图幅磁偏角的新方法。

This paper describes the principle of computing map magnetic declinations, a new method of computing MMD is presented.

youdao