立体SAR影像测图生产DEM的方法

Stereo SAR Image Mapping Production Method of DEM

当今SAR是正处于高速发展中的主动遥感技术之一,SAR影像的处理实现了遥感数据从光学平台到数字平台的跨越式发展。通过数字处理SAR影像有着较好的无失真输出,同样也能保留着相当精确的相位精度。通过同光学航空摄影测量立体测图技术相结合,可以对气候相对复杂无法使用光学立体测图的区域进行采集DEM信息。本文通过介绍立体SAR技术特点,实际生产中利用ERDAS软件提取到大范围的DEM信息的原理以及生成DEM的过程。通过应用实验结果显示利用此软件能够快速有效地提取DEM数据,有效地提高工作效率。

SAR today is in one of the high - speed development of active remote sensing technology, the SAR image processing to a- chieve leapfrog development of remote sensing data from the optical bench to a digital platform. SAR image by digital processing with- out distortion has a better output, also can retain quite precise phase accuracy. By measuring the three - dimensional mapping technol- ogy with optical aerial photography combined, the climate is relatively complicated optical three - dimensional mapping of the area can not be collected DEM information. This paper introduces the characteristics of three - dimensional SAR technology, actual production with ERDAS software extracted DEM information to a wide range of works and DEM generation process. Applied Experimental results show that the use of this software to extract DEM data quickly and efficiently, and has a high work efficiency.