摘要
介绍了ADS40相机快速生成正射影像图的方法,即利用高精度POS设备能直接定向测图的特点,省去空三工序,利用POS解算出的外方位元素和自动提取的DEM进行正射影像纠正,结合实际生产项目对成图精度进行了分析。试验结果表明,ADS40相机应用于航测生产可大幅度缩短成图周期,利用本文的生产方法可以满足正射影像图精度要求,并节省大量时间,适用于应急测绘保障。
Traditional film aerial photogrammetry cameras are gradually replaced by digital cameras. ADS40 is the representative pushbroom digital camera which integrates GPS/IMU system. ADS40 can acquire multi-bandand multi-angle digital images simultaneously. In this paper, a method of quickly generating orthophoto from ADS40 images is introduced. In view of that GPS/IMU system can produce high accuracy position and orientation data, we directly use exterior elements and automatic extracted DEM to rectify raw images. Because of data processing without aerial triangulation and without GCP measured, we can save a lot of time. The experimental results show that the generated orthophoto can satisfy the accuracy requirement of mapping standard with mush less processing time. It is especially fit for rapid response surveying and mapping.
出处
《海洋测绘》
2012年第3期56-58,72,共4页
Hydrographic Surveying and Charting
关键词
应急测绘
三线阵传感器
ADS40
正射影像图
rapid response surveying and mapping
three line scanner
ADS40
orthophoto
