期刊名称：ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences
印刷版ISSN：2194-9042
电子版ISSN：2194-9050
出版年度：1998
卷号：XXXII Part 4
出版社：Copernicus Publications
摘要：Digital Elevation Model (DEM) is indispensable for many analyses such as topographic featureextraction, runoff analysis, slope stability analysis and so on. Beforehand such analyses, accuracy ofDEM must be discussed. The accuracy of DEM is usually represented by spatial resolution and height. Inthis paper, the accuracy of DEM was evaluated according to spatial resolution.Various spatial resolution (50m, 100m, 150m, 200m and 250m grid size) of DEM were prepared forevaluation. Using those DEMs, slope inclination extraction, slope aspect extraction, drainage patterngeneration and slope stability analysis were carried out. Results of each analysis were comparedaccording to spatial resolution.The results showed spatial resolution seriously influenced to slope inclination. The inclination accuracyindicate under 40% even in 100m grid size. Slope stability analysis was also influenced becauseinclination is used in this analysis. However, drainage pattern generation was slightly influenced. Aspatial distribution of slope aspect is used in drainage pattern generation. Information of spatialdistribution of slope aspect might be kept regardless with spatial resolution
