基于高分七号卫星影像的1∶10000 DEM更新方法探讨

Discussion on updating technology of 1∶10 000 DEM based on Gaofen No.7 satellite image

1∶10 000数字高程模型(digital elevation model,DEM)是基础测绘成果的重要组成部分,由于社会经济的发展,地形地貌变化很大,原有的DEM数据不能满足需要。使用原来的更新手段如航空摄影测量和LiDAR,成本高,限制条件多。卫星遥感技术的发展,给DEM的更新提供了新的办法。通过试验探讨利用国产高分七号卫星影像数据更新DEM的技术,结果表明:高分七号卫星立体影像可以满足1∶10 000 DEM更新要求。

1∶10 000 Digital Elevation Model(DEM) is an important part of basic surveying and mapping results.Due to the development of social economy,the topography has changed greatly and the original DEM data can not meet its needs.Using the original update methods,such as aerial photogrammetry and LiDAR,is costly and limited.The development of satellite remote sensing technology provides a new way to update DEM.Through experiments,the technology for updating DEM using domestic Gaofen No.7 satellite image data gets explored and the results show that Gaofen No.7 satellite stereo images can meet the requirements of 1∶10 000 DEM update.