urban clusters in mid- to high- latitudes

Urban clusters of 2013 in mid- to high- latitudes (>30N)The extents of the urban areas were mapped using a cluster-based method that estimates optimal thresholds using nighttime stable-light data from the Defense Meteorological Satellite Program/Operational Linescan System (DMSP/OLS).Using this data, please refer to these papers: Zhou, Y. et al. A cluster-based method to map urban area from DMSP/OLS nightlights. Remote Sensing of Environment 147, 173-185 (2014).Zhou, Y. et al. A global map of urban extent from nightlights. Environmental Research Letters 10, 054011 (2015)