摘要
简要介绍了DEM及其获取方法以及坡度计算方法,通过选取西北干旱区具有代表性的丘陵地和平地作为试验区,建立数字坡度模型,研究了不同分辨率的DEM提取坡度的变化规律,并对坡度提取误差进行了分析,对西北干旱区进行与坡度有关的生态环境建设具有一定的参考价值。
This paper introduces DEM and the method of acquiring it and the method of calculating slope briefly.Through selecting the representative upland and fiat of northwest droughty area as test region and building Digital Slope Model,this paper studies the variational rules of slope-extraction based on DEM with different resolution.We also analyze the error of slope-extraction.Which will be useful for northwest droughty area to construct its entironment that is related to slope.
出处
《北京测绘》
2008年第1期42-45,共4页
Beijing Surveying and Mapping
关键词
DEM
西北干旱区
坡度提取
DEM
northwest droughty area
slope-extraction
