Analysis of spatial-temporal distribution and variation characteristics of night-time light in Anhui Province
The night light image can reflect the brightness of the night light on the surface,which also reflects the intensity of human activities to a certain extent,and the long-term series of night light data has important reference value for economic development research.Taking Anhui Province as the research area,this paper analyzes the spatial and temporal distribution and variation characteristics of luminous night light in Anhui Province based on NPP-VIIRS night light remote sensing images with a time series of 2012 to 2020,and uses GIS spatial analysis,standard deviation ellipse and center of gravity migration trajectory to analyze the spatial-temporal distribution and variation characteristics of luminous night light in Anhui Province,and to study the relationship between luminous and GDP from the time and space scale.The results show that the luminous value in Anhui Province shows a trend of"first slowly rising and then rising rapidly"in the time series,and the proportion of low-light area,medium-light area and high-light region is increasing,and the proportion of lightless area is decreasing.The luminous brightness of the night light in Anhui Province showed a decreasing trend from the central to the north and south in space,the high-light growth area was mainly distributed in the central Anhui area,the low-light growth area was mainly distributed in the northern Anhui area,and most of the lightless area was located in the southern Anhui area.The center of gravity of luminous light in Anhui Province is in Hefei City,and the overall migration to the southwest is high,and luminous and GDP are highly positively correlated with the temporal and spatial changes.
NETL
NSTL
万方数据
维普
