中国长时间序列夜间灯光数据集(2000-2020)
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夜间灯光影像能够反映地表夜间灯光亮度,从而在一定程度上表征人类活动强度,长时间序列的夜间灯光数据对于城市发展研究具有重要参考价值。基于DMSP/OLS第四版非辐射定标夜间年平均灯光强度数据、NPP/VIIRS月度数据和EVI数据,经过数据预处理、校正和数据融合,得到中国长时间序列夜间灯光数据集(2000-2020)。该数据集内容包括:(1)修正的2000-2013年EANTLI年度数据;(2)异常值处理后的2012年4月-2020年12月NPP/VIIRS月度数据;(3)2012-2020年NPP/VIIRS年度数据集;(4)2000-2020年类EANTLI夜间灯光数据集。其中,NPP/VIIRS月度数据集和年度数据集的空间分辨率为500 m,其余数据空间分辨率为1 km。数据集存储为.tif格式,由750个数据文件组成,数据量为2.21 GB(压缩为6个文件,1.71 GB)。
Nighttime light imagery can reflect the nighttime light brightness of the Earth's surface, thereby characterizing the intensity of human activities to a certain extent. Long-term time-series nighttime light data holds important reference value for urban development research. Based on DMSP/OLS Version 4 non-radiometrically calibrated annual average nighttime light intensity data, NPP/VIIRS monthly data, and EVI data, after data preprocessing, calibration, and data fusion, a long-term time-series nighttime light dataset of China (2000–2020) was constructed. This dataset includes the following components: (1) Corrected annual EANTLI data from 2000 to 2013; (2) Outlier-processed NPP/VIIRS monthly data from April 2012 to December 2020; (3) NPP/VIIRS annual dataset from 2012 to 2020; (4) EANTLI-like nighttime light dataset from 2000 to 2020. The spatial resolution of the NPP/VIIRS monthly and annual datasets is 500 m, while the remaining data has a spatial resolution of 1 km. The dataset is stored in .tif format, consisting of 750 data files with a total size of 2.21 GB (compressed into 6 files, 1.71 GB).




