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Extraction and Application of Relief of China Based on DEM and GIS Method

LIU Xin hua 1, YANG Qin ke 1, TANG Guo an 2 (1.Institute of Soil and Water Conservation, Chinese Academy of Sciences and Ministry of Water Resources, Yangling District 712100, Shaanxi Province, PRC; 2.Department of Urban and Resources Science  
Based on micro scale DEM datum, optimum size of analysis windows of relief, which is 5 km×5 km, is defined by means of windows analysis and sample statistical method. Relief in soil erosion of China has been extracted using ARC/INFO software and mapped using Arcview. Applicability of relief was analyzed and initially application of relief factor in assessment of Chinese potential soil and water loss is studied.
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