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《Science of Surveying and Mapping》 2009-01
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Analysis of the correlation between the InSAR DEM accuracy and topographic features

DING Qiong,LIU Guo-xiang,CAI Guo-lin,MA De-ying(Dept. of Surveying Engineering,Southwest Jiaotong University,Chengdu 610031,China)  
In order to analyze the correlation between the topographic feature and the extracted DEM by InSAR technology,experiments were carried out by using two SAR images attached in the ERDAS IMADINE software.Firstly,the derived DEM was compared with the USGS DEM which was considered as reference.Then,reference topographic DEM was used to compute terrain slope and aspect to evaluate the accuracy of the derived DEM as a function of the slopes and aspects.The results showed that InSAR DEM accuracy of this experiment is +19.11m.The DEM was closely correlated with the terrain slope,and better results generally occurred in the foreslopes than in the backslopes.
【CateGory Index】: P225.1
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