GRID3 NER - Population v1.0

This dataset was produced based on the projected 2021 population totals for Communes derived from the 2012 Population and Housing Census, and provided by INS. The projection for all GIS files is the geographic coordinate system WGS84 (World Geodetic System 1984). The zip files contain the following: NER_population_v1_0_gridded.tif This geotiff raster, at a spatial resolution of 3 arc-seconds (approximately 100m at the equator),contains estimates of the total population size per grid cell across Niger. NA values representareas that were mapped as unsettled based on gridded building patterns derived from buildingfootprints (Dooley and Tatem, 2020). These data are stored as floating-point numbers rather thanintegers to avoid rounding errors in aggregated population totals for larger areas. NER_population_v1_0_agesex.zip This zip file contains 40 GeoTIFF rasters representing estimated population counts for specificage and sex groups within grid cells of approximately 100m. We provide 36 rasters for thecommonly reported age-sex groupings of sequential age classes for males and females separately. These are labelled with either an “m” (male) or an “f” (female) followed by the numberof the first year of the age class represented by the data. “f0” and “m0” are population counts ofunder 1-year olds for females and males, respectively. “f1” and “m1” are population counts of 1 to 4 year olds for females and males, respectively. Over 4 years old, the age groups are in five year bins labelled with a “5”, “10”, etc. Eighty year olds and over are represented in the groups“f80” and “m80”. We provide four additional rasters that represent demographic groups often targeted by programmes and interventions. These are “under1” (all females and males under theage of 1), “under5” (all females and males under the age of 5), “under15” (all females and males under the age of 15) and “f15_49” (all females between the ages of 15 and 49, inclusive). These data were produced post-hoc by multiplying the total population counts provided in the NER_population_v1_0_gridded.tif raster and age and sex proportions derived from themicrocensus data for each province. While this data represents population counts, values contain decimals, i.e. fractions of people. This is because both the input population data and age-sex proportions contain decimals. For this reason, it is advised to aggregate the rasters at a coarser scale. For example, if four grid cells next to each other have values of 0.25 this indicates that there is 1 person of that age group somewhere in those four grid cells. Data Citation: Abbott T. J., Chamberlain H., Qader S. H., Lazar A. N., Kuepie, M., Tatem A. J. 2022. Census disaggregated gridded population estimates for Niger (2021), version 1.0. University of Southampton. doi:10.5258/SOTON/WP00733. These data were produced by the WorldPop Research Group at the University of Southampton. This work was part of the GRID3 project with funding from the Bill and Melinda Gates Foundation and the United Kingdom’s Foreign, Commonwealth & Development Office.