利用多时相TM影像分析紫云地区地表植被变化

Using multitemporal landsat TM image analysis for the change of surface vegetation in Ziyun area

将一种利用多时相TM影像分析地表植被变化的新方法运用与实践 ,对紫云地区地表植被变化进行了研究分析。结果证明 ,用不同时相NDVI影像进行彩色合成可以直观地反映地表植被的变化 ,而对不同时相NDVI影像进行NDVI值分级和彩色压缩可以定量和直观地反映区域地表植被的具体变化情况。

In this thesis, mutlitemporal landsat TM image is used for analysis of a new method and practice of surface vegetation change. The surface vegetation change in Ziyun area is studied and analyzed. The result proves that using different mltitemporal landsat NDVI image to color synthesis can reflect the change of the surface vegetation directly. And making NDVI value grading and color density to different multitemporal landsat NDVI image can reflect the area's surface vegetation quantitatively and direct changing situation.