Nighttime lighting data can image the lighting characteristics of a city at night,which can reveal the intensity of human activity.It has gradually become a reliable data source for monitoring urban expansion because of its wide coverage and high frequency.In this paper,the main city center within the main planning scope of Chongqing is taken as the research object.The DMSP/OLS and NPP/VIIRS nighttime lighting data,supplemented by MODIS NDVI data and Landsat data,are used to extract the extent of urban built-up areas within the region and to study the spatial and temporal evolutionary characteristics of urban built-up area expansion.The results show that:The nighttime lighting data can effectively extract long time-series information about the urban built-up areas in the main city of Chongqing;The scope of the urban built-up area in the main urban area of Chongqing shows a trend of expansion from the center to the surrounding area;The development of urban built-up areas in the nine districts of Chongqing's main city has obvious spatial differentiation.
关键词
重庆市主城区/夜间灯光数据/多源遥感数据/城市扩展分析
Key words
Chongqing main city/nighttime lighting data/multi-source remote sensing data/urban expansion analysis
维普
万方数据