无DEM支持的遥感正射影像制作

提出并发展了一套无需ＤＥＭ支持的遥感正射 影像制作方法，包括平坦地区多项式选点整体纠正法、中等超伏地区图形图像局部自适应迭代配准纠正以及大倾斜影像或高山起伏是区基于偏差量算的逐点纠正法。该方法仅需地形 扫描纠正开成的数字栅格地形图（ＤＲＧ）的支持，已通过大量的试验验证并已形成可供实用的软件系统。

Remote Sensing Orthophotoquad Generation without Employing DEM

Remote Sensing Orthophotoquad (RSDOQ) has been widely used in the area of topographic map making and its revision, natural resource and environment surveying and monitoring, natural disaster mitigation and city planning etc.. However, for the generation of RSDOQ, DEM (Digital Elevation Model)is still needed to solve the issues of relief displacement for high resolution image (such as SPOT and IRS). According to the characteristics of aerial image and space remote sensing image, and the difference among topographic relief, this paper proposed and developed new methods of RSDOQ generation without using DEM. The presented methods include integrated geometric rectification in flat area, locally adaptive geometric rectification in medium relief area, and point to point geometric rectification in high relief area. Only DRG (Digital Raster Graphics), the scanned topographic man after geometric correction, is needed in our developed methods. Practical software has been developed and it will be used for the generation of digital orthophoto model (DOD) from remote sensing image in China.