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《Application Research of Computers》 2008-04
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Quantitative simulation for difference between true surface area and planimetric area

LI Wen-hang,GONG Jian-hua(State Key Laboratory of Remote Sensing Science,Institute of Remote Sensing Applications,Chinese Academy Sciences,Beijing 100101,China)  
Using planimetric area instead of true surface area is one common problem in applications based on remote sensing data.To put a premium on this problem,it was much better to analyze the difference between these two area concepts in a quantitative way.This article designed a virtual experiment to do the research.Different kinds of land surface were simulated based on one 1:10 000 DEM,after that,two kinds of area were computed and then the difference according to land types was analyzed.The result shows that the difference gets more when lands' fluctuation get more,with a difference of 38.08% when the average slope gets 44.34°.The result shows that the planimetric area can not always take for true surface area,and the latter should be employed to make the result more precise.
【Fund】: 国家“863”计划资助项目(2005AA218070);; 国家自然科学基金资助项目(40471103);; 国家科技攻关计划资助项目(2004BA718B06)
【CateGory Index】: TP79
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