Analysis on slope uncertainty based on different resolution level DEM A Case Study
Digital Elevation Model (DEM) is indispensable for much analysis such as topographic feature extraction,runoff analysis,slope stability analysis,landscape analysis and so on.Such analysis requires a high accurate DEM.The accuracy of DEM is usually represented by spatial resolution and height accuracy.Slope is one of the crucial terrain variables in spatial analysis and land use planning,especially in the mountain region which is suffering from serious soil erosion.However slope accuracy derived from DEM usually does not match with its popularity.A quantitative simulation to slope uncertainty is important not only theoretically but also necessarily to applications.The objective of this study was to analyze the slope uncertainty of Yizi following GIS based on different DEM resolution.Comparative and math-simulation methodology was employed for data processing and analysis.There is a linear correlativity between mean slope,slope change rate and different DEM resolution within the study area,and the analysis and simulation result shows that different DEM resolution has great influence on slope uncertainty.This methodology applied in this study should be helpful to similar researches in spatial data uncertainty investigation.
GIS DEM slope uncertainty simulation information extraction
Wenfu Peng Jieming Zhou Cun-jian Yang Zhengwei He
Ministerial Key Lab of Land and Resources Information and Applied Technology,Chengdu University of T Provincial Key Lab of Land and Resources planning and evaluation,Sichuan Normal University,Chengdu,6 Ministerial Key Lab of Land and Resources Information and Applied Technology,Chengdu University of T
国际会议
第16届国际地理信息科学与技术大会(16th International Conference on GeoInformatics and the Joint Conference)
广州
英文
2008-06-28（万方平台首次上网日期，不代表论文的发表时间）