数字高程模型是支撑全球变化和区域可持续发展研究的重要基础数据。本文针对东北川岗地形特点，选取典型试验区，在ARCVIEW软件的支持下，对SRTM数据与1：5万、1：10万地形图建立的DEM进行了对比分析。认为SRTM数据能够较好地反映出缓坡地区的坡度变化和细小沟谷的形态特征，利用SRTM数据提取的地形指数能较好地体现水系的自然弯曲，展示谷地串珠状的沼泽洼地形态，与实际地貌形态更为接近，其数据描述精度略高于1：5万地形图DEM。

Digital Elevation Model (DEM) is essential data for research on global environment change and regional sustainable development. Aiming at the topographic characteristics of undulating hills,　using ARCVIEW software, the author selects typical test area and compares SRTM data with the DEM generated from 1:50000 and 1:100000 topographic maps. The result shows that SRTM data can present more detail in gentle slope area and lay out the shape of small channels. Topographic Index extracted by SRTM data is more similar with the actual land surface by giving the natural winding stream and low-lying marshes. Consequently, SRTM data contain more detail than 1:50000 topographically derived DEM.