2000-2020年一带一路500m夜间灯光数据

2000-2020年一带一路夜间灯光数据集。每年1期数据，为当年的年平均值。该数据集包括两个数据源，DMSP-OLS和VIIRS。其中DMSP-OLS的原始空间分辨率为1km，重采样为500m，覆盖时间跨度为2000-2012年，VIIRS的空间分辨率为500m，时间跨度为2012-2020年。每条数据包含一个波段，表示夜间灯光指数， 有效值范围为 1~63，填充值包括两个，其中0表示背景噪声，255表示全年云遮挡的像素，地理坐标系为WGS_1984。Belt and Road Initiative (BRI) nighttime light dataset spanning 2000–2020. One annual dataset is released each year, representing the annual average value of the corresponding year. This dataset includes two data sources: DMSP-OLS and VIIRS. For DMSP-OLS, the original spatial resolution is 1 km, which is resampled to 500 m, with a temporal coverage from 2000 to 2012. For VIIRS, the spatial resolution is 500 m, and its temporal coverage is 2012–2020. Each data entry contains one band representing the nighttime light index, with a valid value range of 1 to 63. There are two fill values: 0 denotes background noise, and 255 denotes pixels with full-year cloud occlusion. The geographic coordinate system adopted is WGS_1984.