IRS-P5卫星影像提取DEM及其地学应用

On DEM extraction based on IRS-P5 stereo images and its application in geosciences

基于高分辨率遥感卫星数据提取DEM技术已广泛应用于地学研究中,但基于IRS-P5立体像对提取DEM的研究应用目前还比较少。主要介绍了IRS-P5卫星获取立体像对的工作原理,立体像对提取DEM原理、方法及精度评定,列举了该技术在地学研究中的应用实例及其应用前景以及存在的问题。结果表明,在良好的地面控制点的支持下,IRS-P5立体像对提取的DEM平面和高程精度均可满足国家山地1∶1万地形图测图规范要求,在地学研究中具有广阔的应用前景。

DEM extraction from high-resolution remote sensing images was widely used in geological study. Use of DEM extracted from IRS-P5 stereo images was relatively less uptill now. The author introduced the principles to obtain stereo images from IRS-P5 satellite,the principles and methods to extract DEM from stereo images,and accuracy assessment about DEM. The author also displayed application of stereo images from IRS-P5 satellite in seismogeology research and the existing problems. The results indicated that the high accurate and well distributed Ground Control Points（ GCPs）,the plane and elevation accuracy of DEM extracted from IRS-P5 stereo images could meet the mapping requirements of national topographic map 1∶ 10,000 in mountainous areas.