Aster数据的DEM生产及精度评价

Production and Accuracy Assessment of DEM from ASTER Stereo Image Data

利用贵州省黎平县ASTER 15m的立体影像像对进行DEM生产并对其精度进行评价。研究结果表明 :ASTER数据提取DEM是可行的 ;地面控制点 (GCPs)的精度、分布和数量是决定提取DEM数据精度的关键 ;控制点数目较多 ,分布均匀时可以大大提高DEM提取的精度。

Production and accuracy assessment of DEM using ASTER Stereo image data over Liping County in Guizhou Province are implemented. Results indicate that using ASTER stereo image data to produce DEM is feasible; the accuracy?distribution and numbers of GCPs are critical for DEM accuracy and more accurate results can be achieved in elevation if GCPs reach certain numbers and distributed equably.