A NEW PROCEDURE FOR GRIDDING ELEVATION AND STREAM LINE DATA WITH AUTOMATIC REMOVAL OF SPURIOUS PITS
A NEW PROCEDURE FOR GRIDDING ELEVATION AND STREAM LINE DATA WITH AUTOMATIC REMOVAL OF SPURIOUS PITS
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DOI：
10.1016/0022-1694(89)90073-5
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发表时间：
1989-04-30
影响因子：
6.4
通讯作者：
HUTCHINSON, MF
中科院分区：
文献类型：
--
作者：
HUTCHINSON, MF
描述了一种由特定于地面的高程数据点和选定的流线进行规则栅格数字高程模型(DEM)内插的形态方法。这种方法产生了一种计算高效的内插过程，它将地形特定粗糙度惩罚的最小化与自动排水强制执行算法相结合。排水强化算法去除了产生DEM的伪汇或坑，这在水文过程研究中可能是有利的。排水执行算法也被发现显著提高了从稀疏但精选的地表特定高程数据中内插DEM的精度。此外，它还有助于检测高程数据中的错误，而这些错误是更传统的统计手段无法检测到的，并为制图综合奠定了良好的物理基础。
A morphological approach to the interpolation of regular grid digital elevation models (DEMs) from surface specific elevation data points and selected stream lines is described. The approach has given rise to a computationally efficient interpolation procedure which couples the minimization of a terrain specific roughness penalty with an automatic drainage enforcement algorithm. The drainage enforcement algorithm removes spurious sinks or pits yielding DEMS which may be used to advantage in hydrological process studies. The drainage enforcement algorithm has also been found to significantly increase the accuracy of DEMs interpolated from sparse, but well chosen, surface specific elevation data. Moreover, it facilitates the detection of errors in elevation data that would not be detected by more conventional statistical means and forms a sound physical basis for cartographic generalization.