基于资源三号测绘卫星DSM的精度评估研究

ZY-3 Surveying and Mapping Satellite DSM Accuracy Assessment

作为我国首颗民用立体测绘卫星数据产品,ZY-3 DSM对于我国地学分析具有极其重要的作用。本文在顾及地貌情况前提下,选取云南省高海拔山区为试验区,辅以1∶10 000野外实测地形图DEM为参考值,将分辨率为15 m的ZY-3 DSM与90 m的SRTM DEM从高程精度和地形精度进行较为全面的数据质量比较。结果表明:ZY-3 DSM在高程精度和地形精度均有更好的表现。总体看来,ZY-3 DSM数据质量更高,具有更广泛的利用价值。

In order to understand the accuracy of Resources satellite three DSM data,selecting ZY- 3 DSM data in the high elevation mountain area,treating the field surveying data DEM and SRTM DEM as reference contrastive data,and compare their accuracy with field surveying data through elevation accuracy and accuracy of terrain representation. The studying results show the elevation accuracy of ZY- 3 DSM is better than the SRTM DEM. In terms of the accuracy of terrain representation,ZY- 3 DSM is closer to the theoretical value. Summarizing the above analysis,the accuracy of ZY- 3 DSM is better than the SRTM DEM.