SPOT5卫星影像在退耕精确监测中的应用研究

Application of SPOT5 Images to Accurate Monitoring of the Project of Returning Land for Farming

退耕还林(草)是针对水土流失治理、改善西部脆弱的生态环境而采取的一项重大举措。以2003年9月9日获取的庄浪县SPOT5卫星影像为例,讨论了SPOT5卫星影像的正射纠正方法,详细介绍了影像纠正前根据参考图选点误差、数字高程模型的误差精度和传感器内部结合误差三方面对影像纠正应该达到的精度理论值进行评估,以及纠正后对影像几何精度的精度评定的方法。讨论了在缺少蓝色波段的情况下通过波段计算合成真彩色影像的技术和处理方法,并结合退耕还林工程的实际情况进一步探讨了经过处理后的SPOT5影像在退耕信息可视化和精确监测中的应用。

The project of returning land for farming to forest and grassland aimed at control of soil and water loss, improvement of fragilely ecological environment in West China. This paper exemplified Gulang County with SPOT5 image in 9 September, 2003, and discussed orthorectification of SPOT5 and technologies and processing methods of true color composition by band calculation in lack of blue band, and expatiated on the accuracy evaluation before and after image correction. This paper further discussed the application of processed SPOT5 images to the visualization of information of returning land for farming and accurate monitoring.