The dataset is available to download in Geotiff format at a resolution of 3 arc-second approximately 100m at the equator. The projection is Geographic Coordinate System, WGS84. The value of each grid cell represents its surface area (in square meters).Data Source: Population data sources (for the whole 2000-2020 period)Methodology: Methodology: Lloyd, C. T., H. Chamberlain, D. Kerr, G. Yetman, L. Pistolesi, F. R. Stevens, A. E. Gaughan, J. J. Nieves, G. Hornby, K. MacManus, P. Sinha, M. Bondarenko, A. Sorichetta, and A. J. Tatem, 2019. "Global Spatio-temporally Harmonised Datasets for Producing High-resolution Gridded Population Distribution Datasets". Big Earth Data (https://doi.org/10.1080/20964471.2019.1625151); modified from Santini M., Taramelli A., and Sorichetta A., 2010. "ASPHAA: a GIS-based algorithm to calculate cell area on a latitude-longitude (geographic) regular grid". Transactions in GIS, 14(3), 351-377 (https://doi.org/10.1111/j.1467-9671.2010.01200.x).