基于遥感的承德围场县植被动态变化监测研究

以承德市围场县为例，探讨了利用遥感技术从Landsat-TM图像中监测植被动态变化的方法．该方法首先对1987年的Landsat-TM图像进行几何校正，并将1999年的Landsat-TM图像与其配准．先从1987年Landsat-TM图像中提取植被指数，再对1987年的植被指数图进行非监督分类，得到1987植被分布图．对1999年的Landsat-TM进行非监督分类，得到1999年的植被分布图．最后，对1987年和1999年的植被分布结构图应用ARCVIEW进行叠合分析，求出植被的变化．该研究表明，此法可以简单有效地将植被的动态变化信息予以监测，得出围场县1999年与1987年相比植被增加987．7Km^2的结论．

Dynamic Monitoring of the Vegetation Changes Using Remote Sensing Technology On Chengde City Weichang

This paper takes Weichang county for example, discusses the method that monitors vegetation dynamic change from the Landsat-TM image using remote sensing technique. Landsat-TM image in 1999 is geo-corrected to Landsat-TM image in 1987. Next vegetation index is first extracted from 1987 Landsat-TM image, then the 1987vegetation index image is made unsupervised classification, and gets the 1987 vegetations distribution image. Direct unsupervised classification is made to 1999 Landsat-TM image, and gets the 1999 vegetation distribution image. Finally, the vegetation distribution image in 1987 and in 1999 is applied in ARCVIEW to make overlay analysis, and gets the change of vegetation during 1987- 1999. This research indicates that this method can simply and effectively monitor the change information of vegetation, and the vegetation increased 987.7 Km^2 in 1999 compared with 1987.