It is known that flat areas and closed depressions often arise because of low quality input data, interpolation errors during DEM generation et al.
DEM中的闭合洼地和平坦区域是由于低质量的资料输入、生成DEM时的内插误差等引起的。
Next, this method and the interpolation method are compared, and the combination of administrative, DEM and land use classification data on drought were analyzed too.
接下来对该方法和插值方法进行了比较，并且结合行政区、DEM及土地利用分类数据对旱情进行了统计分析。
Spatial data interpolation is an indispensable process in DEM.
空间数据内插是DEM建模中不可缺少的环节。
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