资源三号卫星影像DEM提取与精度分析  

DEM Extraction and Precision Analysis Based on ZY-3 Remote Sensing Data

作　　者：兰穹穹[1] 郝雪涛[1] 齐怀川[1] 

机构地区：[1]中国资源卫星应用中心,北京100094

出　　处：《遥感信息》2015年第3期14-18,共5页Remote Sensing Information

基　　金：国防科工局民用航天专业技术预先研究项目(D040201)

摘　　要：为提高国产遥感卫星影像定位精度,提取高精度DEM,该文基于卫星遥感的成像模型和间接平差理论,利用有理函数模型和像面仿射变换模型,构建了卫星影像平差数学模型;利用该数学模型对资源三号卫星立体影像进行了平差处理,建立了研究区域DEM。分析结果表明:DEM在无控制点情况下,平地区域平面精度达到6.12m,高程精度达到8.39m;山地区域平面精度达到6.20m的,高程精度达到8.62m,数据精度能够满足1∶50000比例尺地形图测图标准和要求。研究结果验证了国产卫星数据的定位精度。In order to improve the position accuracy of domestic remote sensing imagery and obtain an accurate DEM(digital elevation model),a mathematical adjustment model was constructed using the transformation in image plane and RPC model.Block adjustment on ZY-3imagery was performed using the constructed model.Several GCPs(ground control points)were selected for computation and validation.The method with both of a few of GCPs and none GCPs were performed.As to the method with none GCPs,the plane precision is 6.12 mand the height accuracy is 8.39 min flat land while 6.20 mand 8.62 min mountain area according to the validation.Based on the result of adjustment,the DEM which covers the study area was interpolated.Compared to the SRTM DEM,the interpolated DEM keeps the same trend and a high degree of coincidence between them was proved.The result shows the potential of using this model to process the ZY-3imagery for extracting the DEM.

关 键 词：资源三号卫星 RPC模型 DEM 区域网平差 精度 

分 类 号：P237[天文地球—摄影测量与遥感]