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《Acta Geodaetica Et Cartographic Sinica》 2004-03
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A Study of Accuracy and Algorithms for Calculating Slope and Aspect Based on Grid Digital Elevation Model(DEM)

LIU Xue-jun~(1,4), GONG Jian-ya~2, ZHOU Qi-ming~3, TANG Guo-an~1 for Information Engineering in Surveying, Mapping and Remote Sensing, Wuhan University, Wuhan 430079, China; 3. Hong Kong Baptist University, Hong Kong, China, 4. Changsha Science and Technology University, Changsha 710069, China)  
Slope and aspect is the most frequently used terrain parameters in Geo-science models such as hydrological models and soil erosion models of Geological Information System (GIS). But there are some misunderstanding on slope and aspect accuracy and algorithms based on Digital Elevation Model (DEM). The accuracy of slope and aspect is studied and six slope algorithms are compared, The results are confirmed on data independent DEM. The conclusions of this paper clarified some existing mistakes of slope and aspect accuracy and algorithms.
【Fund】: 香港浸会大学研究基金资助项目(FRG/98 99/Ⅱ 35);; 国家自然科学基金资助项目(40271089)
【CateGory Index】: P217
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