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《Journal of Lanzhou University(Natural Sciences)》 2008-S1
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Analysis of the relief amplitude in Xinjiang

ZHANG Jun~1 LI Xiao-dong~(1,2) CHEN Chun-yan~1 LIU Jun-yan~1 (1.College of Resources & Environmental Science,Xinjiang University,Urumqi 830046,China;2.College of Tourism,Xinjiang University,Urumqi 830046,China)  
On the base of the Xinjiang 1:250000 DEM data,through the careful analysis of Xinjiang's geomorphologic features,with the support of the GIS system,using the neighborhood analysis,selecting 2×2,3×3,4×4,...,21×21,25×25,30×30,etc 22 numbers of neighborhood analysis window,using mean change-point analysis for their best statistical unit.The results show that the curve appeared the inflection point at the grid unit of 8×8 mesh size(2.56 km~2),which may be called"threshold".Before the inflection point,the cure rose very rapidly,but it grew comparatively much slower after the inflection point;finally it was concluded that the best statistical unit of the Xinjiang relief amplitude calculation that based on 1:2500 000 DEM,is got,and the drawing of Xinjiang relief amplitude grade is completed.
【Fund】: 新疆自治区高校科研计划项目(XJEDU2004106,XJEDU2005107)资助.
【CateGory Index】: P931
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