Census disaggregated gridded population estimates for Niger (2021), version 1.0.

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 represent areas that were mapped as unsettled based on gridded building patterns derived from building footprints (Dooley and Tatem, 2020). These data are stored as floating-point numbers rather than integers to avoid rounding errors in aggregated population totals for larger areas.

This README file provides information about the data included in the data release, how it was produced, source data that were used, and known assumptions and limitations of the results.

This zip file contains 40 GeoTIFF rasters representing estimated population counts for specific age and sex groups within grid cells of approximately 100m. We provide 36 rasters for the commonly 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 number of the first year of the age class represented by the data. “f0” and “m0” are population counts of under 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 the age of 1), “under5” (all females and males under the age of 5), “under15” (all emales 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 the microcensus 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.

This geotiff raster contains 1s for each approximately 100m grid cell (0.0008333 decimal degrees) across the study area. Zero values indicate grid cells that did not contain buildings and were therefore assumed to be unpopulated. NAs show grid cells considered as outside the study area.