The precision evaluation of DEM extracted by ENVISAT data
ZHANG Hebing
DUAN Dongbin
CHEN Ningli
SONG Xiangping
LU Laiyun
Abstract：Aiming at evaluating the precision of DEM generated by radar interferometry,a method of the checkpoints is put forward to sample the data of DEM.The difference comparison and correlation analysis are used to analyze the stability and evaluate the precision of DEM.Take data of ENVISAT as an example,fitstly,the experiment of extracting DEM is done,and then the data of GDEM ASTER and SRTM is selected as a reference.Finally,the result of the experiment is analyzed.The results show that,the DEM data in the gentle hilly topography has lower error and the precision of DEM can reach at 30 m.While,in steep topography the DEM has larger error and the precision of DEM is poor.The experimental results verify that the method is practicable and provides a useful reference for evaluating the relative precision of DEM.
Keywords：Synthetic aperture radar interferometry(InSAR)digital elevation modelsingle look complex imagephase unwrappingcorrelation analysis
Publication Date：2017-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：7( 48-54 )