IRS-P5立体像对提取DEM及精度评价  

DEM Extraction and Accuracy Assessment Based on IRS-P5 Stereo Images

作　　者：范兴旺[1] 翁永玲[1] 胡伍生[1] 徐君民[2] 刘团荣[1] 

机构地区：[1]东南大学交通学院测绘工程系,江苏南京210096 [2]江苏省电力设计院,江苏南京211102

出　　处：《遥感技术与应用》2010年第4期547-551,共5页Remote Sensing Technology and Application

基　　金：江苏省电力设计院-东南大学科研合作项目"基于RS的输电线路径优化技术研究"(8521002486)

摘　　要：利用IRS-P5同轨立体像对构建DEM并讨论DEM的精度,分析了不同地面控制点组合下的影像定位精度。在至少采用4个地面控制点的情况下,平面和高程方向影像定位精度能够达到2 m的精度。用抽样检查和差值运算的方法对DEM的精度进行了评价,认为P5立体像对生成DEM基本满足国家1∶50 000大比例尺地形图制图的要求。实际选线证明IRS-P5影像生成的DEM满足电力选线的要求。Experiment was carried out using IRS-P5 stereo images in order to extract DEM and corresponding DEM precision analysis was performed.With at least 4 well-distributed reliable ground control points,planar and vertical orientation accuracy can reach 2 m RMSE separately.Meanwhile this paper proposed two methods to inspect DEM precision,that is,sampling and differencing methods.By these two algorithms,we are convinced that this DEM can meet the geometric requirements of 1∶50 000 large scale maps.Actually,it has proven that this DEM acted as an effective auxiliary tool for power line selection.

关 键 词：IRS-P5 立体像对 有理多项式系数 数字高程模型 精度评价 VIRTUOZO 

分 类 号：P231.5[天文地球—摄影测量与遥感] TP751[天文地球—测绘科学与技术]