集成形态学重建和测地距离变换的DEM内插方法

发布时间：2018-05-09 16:23

本文选题：形态学重建 + 测地距离变换　；参考：《武汉大学学报(信息科学版)》2016年07期

【摘要】：等高线是获取数字高程模型(DEM)常用的数据源之一,但内插方法对DEM生成精度有显著的影响。基于形态学重建和测地距离变换运算,提出一种等高线数据生成DEM的内插方法。形态学重建用于获取与空间一点对应的最邻近的上等高线和下等高线的高程值,测地距离变换用于获取该点到上下两条等高线的测地距离;使用沿流水线的线性内插获取该点的高程值。实验表明,在只使用等高线数据生成DEM的情况下,本文提出的内插方法获取的DEM精度更高。
[Abstract]:Contour line is one of the commonly used data sources to obtain digital elevation model (DEM), but interpolation method has a significant impact on the accuracy of DEM generation. Based on morphological reconstruction and geodesic distance transform, an interpolation method for contour data generation DEM is proposed. Morphological reconstruction is used to obtain the elevation values of the nearest and lower contours corresponding to a point in space, and the geodesic distance transformation is used to obtain the geodesic distance from the point to the upper and lower contours. The elevation of the point is obtained by linear interpolation along the pipeline. The experimental results show that the interpolation method proposed in this paper can obtain higher precision of DEM under the condition that only contour data is used to generate DEM.
【作者单位】：中国测绘科学研究院摄影测量与遥感研究所;
【基金】：国家自然科学基金(41371405) 国家测绘地理信息局基础测绘项目(A1506) 中央级公益性科研院所基本科研业务费专项资金(7771413)~~
【分类号】：P208

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