A Study On Land Use Change in Changsha City Based on Landsat Data

In recent years, with the rapid development of economy and society, people's land use activities have become more and more frequent and intense, which has caused many environmental and resource problems, and the changes in the global environment have increasingly become the focus of human society. With the deepening of relevant research, the main reason for environmental change is the change of people's land use. Therefore, in order to achieve coordinated economic development and the protection of resources and environment, land use change has become a hot issue in the study of global environmental change. In order to reveal the characteristics of land use change in Changsha in recent years, this paper applied remote sensing technology and geographic information system technology to carry out a series of studies on the three Landsat remote sensing images and basic geographic data in Changsha in 2012, 2015 and 2018. The results show that from 2012 to 2018, the area of cultivated land and forest land in Changsha decreased, and the area of construction land and grassland increased, and in terms of ecological protection, the water area and water volume of Changsha decreased slightly in the past six years.