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《Science of Surveying and Mapping》 2003-01
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Some Key Points in Terrain Variables Deriving from DEMs

TANG Guo an ①,YANG Wei ying ②,YANG Xin ①,LIU Ai li ①,YI Hong wei ①,LI Xiao yin ①(①Department of Urban and Resource Science of Northwest University, Xi'an 710069,China;②Department of Applied Geophysics of China University of Geosciences, Wuhan 430074, China)  
It is a critical work to drive topographic structure in geo spatial analysis. DEM has commonly accepted as a convenient methodology in extracting terrain features. On the basis of a comprehensive summarizing and reviewing of existing results, this paper compares the basic theories and methods in deriving terrain variables from DEMs, which is hopefully of significance for the further development in this aspect.
【Fund】: 国家高技术研究发展计划课题 (2 0 0 1AA130 0 2 3);; 国家自然科学基金项目 (40 2 710 89);; 测绘遥感信息工程国家重点实验室高级访问学者基金项目
【CateGory Index】: P216
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