全球测图DEM生产关键技术研究及应用

Research and application of key technologies in global mapping DEM production

国家全球战略急需全球地理信息资源的支撑。如何利用国产高分辨率卫星影像高效生产全球DEM已经成为我国全球地理信息资源建设工程的重大任务。本文研究了全球地理信息资源建设工程框架下基于DSM生产DEM的关键问题;针对关键问题,结合目前已有的国产软件,开展滤波及编辑等生产试验工作,并对试验结果进行了精度分析。通过本次研究,为工程基于DSM数据开展DEM的生产探索了方向,为更好地完成全球地理信息资源建设任务奠定了技术基础。

Precision and high-resolution global DEM composes the fundamental basis of the spatial data infrastructure for a variety of applications.To obtain high precision global DEM using domestic high-resolution satellite images,is one of the most important requirements for the construction of global geographic information resources of China.This paper studies the key techniques of making DEM based on DSM under the global geographic information resources construction framework.At the same time,using domestic software to carry out filtering and editing experiments on these critical issues.In the end,the paper has a precision analysis of the results.This study has a guiding effect on the production of DEM based on DSM,and it lays the groundwork for better completion of the global geographic information resources construction.