摘要基于ALOS DEM、ASTER GDEM和SRTM DEM 3种不同空间分辨率的元谋县DEM数据,利用信息熵和直方图匹配原理对得到的地形因子进行处理。结果表明:(1)在元谋县进行地形因子研究的最佳格网尺寸为12m;(2)基于直方图匹配原理构建了地形因子降尺度模型,R2均大于0.9,表现效果较好;(3)利用样本点数据对转换后的结果进行验证,决定系数均在0.4以上,均方根误差均小于8。
1TANG Guo-an~1, Josef Strobl~2, GONG Jian-ya~3, ZHAO Mu-dan~1, CHEN Zhen-jiang~1 (1. Department of Geography, Northwest University, Xi’an 710069, China,2. Department of Geography and Geoinformation, Salzburg University, Hellbrunnerstr. 34, A-5020 Salzb.Evaluation on the accuracy of digital elevation models[J].Journal of Geographical Sciences,2001,11(2):209-216. 被引量：13
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