利用IRS-P5立体像对快速提取地震灾区震后DEM

The Use of IRS-P5 Stereo Image Pair to Obtain Post-earthquake DEM Quickly in the Earthquake-stricken Area

针对地震灾区震后DEM数据获取困难的问题,总结出一种较传统方法更加快速便捷的实现途径。利用易测E640GPS接收机和MobileMapper手持接收机采集GPS卫星数据,并对GPS数据进行后差分处理得到控制点坐标,以这些控制点作为IRS-P5立体像对的地面控制点,并根据IRS-P5立体像对生成最终的DEM数据。本文使用这种方法成功获取了控制点并在Envi软件中使用IRS-P5立体像对生成DEM,并对DEM进行精度评价。

According to the difficult of acquiring DEM data in the earthquake-striken area,use YiCe E640 GPS receiver and MobileMapper hand receiver to record GPS satellite data,after the differential treatment of the GPS satellite data,we obtain the control point coordinate.The coordinates of these control points that can be used as ground control points of IRS-P5 stereo image pair,this approach is fast and convenient than traditional methods.In this paper,we use this approach to obtain the control point coordinate and use the IRS-P5 stereo image pair to produce DEM.we also Evaluation of the accuracy of the DEM.