一种基于地形特征的等高线内插方法及其应用

A Method of Contour Interpolation Based on Terrain Features and Its Application

提出了一种基于地形特征的等高线内插方法。该算法的主要思路是利用等高线生成不规则三角网,基于地性线树方法对三角网进行去平三角处理,使之符合实际地形特征,随后利用不规则三角网内插生成DEM,最后利用DEM重新追踪新的等高线。实验表明,该算法仅需包含关键地形特征的等高线段即可内插出完整的等高线,在实际地貌生产工作中具有一定的实用价值。文章最后分析了该方法的不足,提出了后续的研究重点。

This paper proposes a contour interpolation method based on terrain features. The main idea of the algorithm is to generate irregular triangulation by using contour lines, and use the geodesic tree method to de-level the triangle network to make it conform to the actual terrain features, and then use the irregular triangulation to generate DEM. Finally, it uses the DEM to re-generate the new contours. The experiment shows that the algorithm only needs to include the contour line segments of key terrain features to interpolate the complete contour lines, which has certain practical value in the actual landform production work. Finally, the shortcomings of the method and the subsequent research focus are also analyzed.