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Effect of Sink Filling on DEM Uncertainty Evaluation
Author(s): WANG Peifa, DU Jinkang, FENG Xuezhi(departmentofgeographicalinformationscience, NANJING University, NANJING 210093, china)
Pages: 24-
26
Year: 2007
Issue:
1
Journal: Geography and Territorial Research
Keyword: DEM不确定性; 填洼; 蒙特卡罗模拟; 皎口流域;
Abstract: 洼地广泛存在于DEM实现中,洼地的处理会影响DEM不确定性评价结果。该文利用蒙特卡罗方法模拟DEM不确定性,用偏差指标评价DEM不确定性对坡度和地形指数的影响,将填洼与不填洼情况下的偏差指标相减来量化填洼对DEM不确定性评价的影响。研究发现,洼地对不同参数DEM不确定性影响评价作用不同,随着DEM不确定性的增大,洼地的影响也增大。
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