考虑高层建筑的高分辨率卫星影像几何定位  

Geo-positioning Capability of High-resolution Satellite Stereo Imagery for High-rise Buildings in Urban Area

作　　者：乔刚[1,2,3] 王卫安[1,2,3] 

机构地区：[1]同济大学测量与国土信息工程系,上海200092 [2]同济大学空间信息科学及可持续发展应用中心,上海200092 [3]同济大学现代工程测量国家测绘局重点实验室,上海200092

出　　处：《同济大学学报（自然科学版）》2010年第11期1694-1700,共7页Journal of Tongji University:Natural Science

基　　金：国家"八六三"高技术研究发展计划资助项目(2007AA12Z178;2009AA12Z131);现代工程测量国家测绘局重点实验室经费资助项目(TJES0905);矿山空间信息技术国家测绘局重点实验室经费资助项目(KLM201010);光华同济土木学院基金资助;空间数据挖掘与信息共享教育部重点实验室经费资助项目(201004)

摘　　要：研究城市高层建筑环境下高分辨率卫星立体影像的几何校正方法和精度分析.实验结果表明,为了提高基于有理函数模型的定位精度,需要加入部分地面控制点.但是当控制点位于地面时,传统物方几何校正模型可以对平坦地面点进行有效几何校正,而建筑物楼顶点会出现高程外推计算错误.为此,提出一种改进的物方几何校正模型,可以消除建筑物高程差过大造成的几何定位影响.计算结果显示,在上海城市中心区域的实验中可以达到平面方向0.6 m和高程方向0.8 m的定位精度,证明了该改进模型的有效性.This paper focuses on the geo-positioning capability and accuracy evaluation of high-resolution satellite stereo imagery for high-rise buildings in urban area. The experimental result shows that ground control points （GCPs） are needed in order to improve the geo-positioning accuracy derived from the rational function model （RFM）. The traditional geometric correction model in object space is effective when GCPs and independent check points （ICPs） are both on flat ground, but the computation error caused by elevation extrapolation appears when ICPs are on high building rooftops. A modified geometric correction model in object space is then proposed to eliminate the error introduced by huge elevation difference on high buildings. The result shows that a geo-positioning accuracy of 0.6m in horizontal direction and 0. 8m in vertical direction was achieved in Shanghai central district with high buildings involved, proving the effectiveness of this modified model.

关 键 词：卫星立体影像 高分辨率 有理函数模型 几何校正模型 定位精度 

分 类 号：P236[天文地球—摄影测量与遥感]