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中文摘要：
本文以干旱、半干旱地区的渭干河-库车河三角洲绿洲为研究区域,利用样区的1∶50 000的矢量地形图为数据源,通过对不同插值算法生成的DEM计算坡度,坡度计算像元值分别采用25m、50m、100m、150m、200m,5个分级。通过对比研究发现：在坡度小于27°时,不同的算法对坡度具有显著的影响,而大于27°时,算法不会对坡度产生显著影响。在坡度图不同分辨率情况下,不同算法对坡度影响的主要是小于12°的区域,而大于12°时分辨率对坡度没产生显著的影响。不同算法生成的DEM在坡度比较大的地方均呈现相似的趋势,而且分辨率对坡度并无显著的影响。
英文摘要：
Taking the Delta Oasis of Ugan and Kuqa rivers in arid and semi-arid region as research region,using the digital contour with the scale of 1：50 000 as the data source,this paper compared the slope with the cell size of 25m,50m,100m,150m,200m which generated from the DEM with four interpolation algorithms.The results showed that there were significant effect on the slope among the algorithms when the slope 27°,but there were no significant effect on the slope when the slope 27°.With different resolution,there were significant effect on the slope among the algorithms when the slope 12°,when the slope 12°,the effect was not obviously.Thus,when the slope was comparatively large,there were no significant effect on the slope among the algorithms and resolution.
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