文中介绍了利用单张航摄像片制作正射影像图的几种典型方法，并给出了它们的算法实现，最后作了简单的对比分析。

In the paper, several typical ways in this respect are introduced and their algorithmic realization are given, furthermore, a simple comparison and analysis are also made.

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正射影像图因为保留了航摄像片丰富的影像信息又具有地形图的特征，因此，在实际生产中得到了越来越广泛的应用。

Orthophotomap has been increasingly used to practical production because it keeps rich aerial photograph information and has the feature of topographic map.

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