Multi-scale analysis of vegetation cover changes in central Hunan region
As a planting index,NDVI data set can reflect the changes of regional vegetation coverage to a certain extent,which is an important index to monitor the change of ecological environment.In this paper,the NDVI dataset with a resolution of 250 m was used as the data source,and the unitary linear regression method and correlation coefficient method were used to conduct comparative analysis from the vegetation cover of the central Hunan region(XT),and the vegetation change at different scales was analyzed from the three scales of the province,city and county.It provides reference for the formulation of macro-ecological policies on different scales.The results showed that the vegetation in most areas of the region showed a significant increase trend.Compared with the average annual growth rate of the whole province,the vegetation cover growth rate of XT City was lower than the average annual growth rate of the province,and the vegetation cover of XT and XX and SS City showed a significant growth trend.
normalized difference vegetation indexvegetation coveragemulti-scale analysisspatial and temporal variation
NETL
NSTL
万方数据
