Annual maps of global urban extents between 1992 to 2020 from SRU-Net NPP-VIIRS-like nighttime light data

The dataset contains a consistent annual global urban extents between 1992 to 2020 from SRU-Net NPP-VIIRS-like nighttime light data. The pixel value is 0 or 1. 0 means non-urban, and 1 means urban. Spatial Resolution: 500m Spatial Refrence: North_Pole_Lambert_Azimuthal_Equal_Area Extent: spanning -180 to 180 degrees longitude and -65 to 75 degrees latitude. Each zip file contains an urban extent image in geotiff format. The filename of each image is "UByyyy", where "yyyy" is the year of the image.本数据集基于SRU-Net类NPP-VIIRS夜间灯光数据，构建了1992年至2020年的逐年一致全球城市建成区范围数据集。影像像素值仅为0或1，其中0代表非城市区域，1代表城市区域。空间分辨率为500米，空间参考系为北极Lambert方位等面积投影（North Pole Lambert Azimuthal Equal Area），覆盖范围为经度-180°至180°、纬度-65°至75°。每个压缩包均包含一份GeoTIFF（Geographic Tagged Image File Format）格式的城市建成区范围影像，影像文件命名格式为"UByyyy"，其中"yyyy"代表对应影像的年份。