利用DEM对卫片进行正射纠正生产DOM的探讨

Research of ortho-rectified for satellite images and production of DOM with DEM

随着数字摄影测量学及相关技术的发展,数字正射影像图日益成为人们关注的重点,数字正射影像图具有传统的影像图和线划图所无法比拟的优点,其应用前景非常广阔.针对数字正射影像图的生产问题,提出了基于数字高程模型对卫片进行正射纠正的原理,利用多项式纠正的方法实现对卫片的正射纠正,结合PCI Geomatica和MAPGIS等工具软件,确定了生产数字正射影像图的工艺流程.该方法大大降低了生产成本,提高了生产效率,已成功地应用于1∶10000卫星数字正射影像图的数据库建设.

With the development of digital photogrammetry and related technology,Digital Orthophoto Map（DOM） has become the focus because of its incomparable advantage over the traditional images or DLG（Digtal Line Graphic）,whose applications has very broad prospects.Based on the producing problems of DOM,this paper describes the principle of satellite image orthophoto correction with DEM（Digital Elevation Model）.The polynomial method was used to realize the orthophoto correction and the process flow of producing DOM was established by using of PCI Geomatica and MAPGIS.This method has greatly deduced production cost and improved production efficiency,and successfully applied on the database establishment of 1：10 000 satellite DOM.