通过对目前非线性扩散算法的分析、总结，提出了基于区域特征分析的地形图图像自适应平滑算法。
With the summary and analysis of available anisotropic diffusion algorithms, a new adaptive diffusion algorithm based on image characteristics is presented.
区域踏勘是定线测量的第一步。定线人员利用现有地形图，有时利用飞机对该区域进行探测。
Reconnaissance of the area as the first step, the locator, using available topographic maps and sometimes an airplane, explores the area.
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