论文部分内容阅读
以MODIS遥感影像为数据源,利用ENVI遥感影像处理软件,笔者对山西省2005年9月和2006年9月两期MODIS影像的植被指数进行计算,建立了两期植被指数密度分割模型,以获得全省植被覆盖的整体状况,通过对两期植被指数影像图进行动态链接、叠加以及结合相减比较,可以看出两年间全省的植被覆盖空间变化情况。结果表明:全省较低植被覆盖区不多,高植被地区主要分布在中部以南地区,中低植被覆盖集中在中部以北地区。两年的植被指数比较结果表明,全省中等植被覆盖区有所增加,但高植被覆盖区增加不明显。
Taking MODIS remote sensing image as data source and using ENVI remote sensing image processing software, the author calculated the vegetation index of two MODIS images in September 2005 and September 2006 in Shanxi Province, established two vegetation index density segmentation models to obtain The overall vegetation cover of the province, through the dynamic linkage of two vegetation index images, superimposed and compared with the subtraction, we can see the two years the province’s vegetation cover changes in space. The results showed that there were not many vegetation cover in the province, and the vegetation in the high vegetation area mainly distributed in the south of central China. The vegetation coverage in the middle and low concentrations concentrated in the north of central China. The two-year vegetation index comparison shows that the coverage of middle-level vegetation in the province has increased, but the increase of high-vegetation coverage has not been obvious.