Skip to contents

Generate GHSL GHS Population Grid

Source: R/data_ghsl.R
gen_ghsl_population_grid.Rd

Aggregates the high-resolution GHSL (Global Human Settlement Layer) GHS Population Grid data to PRIO-GRID resolution for all available 5-year intervals (1975–2030). This provides population counts per PRIO-GRID cell.

Usage

gen_ghsl_population_grid()

Value

A SpatRaster object

Details

This operation can be computationally intensive and may take time depending on system performance and the size of the underlying rasters.

A slight nearest neighbor resampling was applied to get the exact PRIO-GRID extent.

Note

  • Aggregation uses sum to preserve total population counts

  • Nearest-neighbor resampling is applied for spatial alignment

  • Large rasters may require significant memory and processing time

References

Schiavina M, Freire S, MacManus K (2023). “GHS-POP R2023A - GHS Population Grid Multitemporal (1975-2030).” doi:10.2905/2FF68A52-5B5B-4A22-8F40-C41DA8332CFE , 2024-09-27.

Examples

if (FALSE) { # \dontrun{
# Generate PRIO-GRID level GHSL population rasters
ghsl_pg <- gen_ghsl_population_grid()

# Inspect structure
print(ghsl_pg)

# Plot population for 2020
terra::plot(ghsl_pg[["2020-12-31"]],
            main = "PRIO-GRID Population Distribution 2020")

# Compute total population per PRIO-GRID cell change over time
pop_1990 <- ghsl_pg[["1990-12-31"]]
pop_2020 <- ghsl_pg[["2020-12-31"]]
change <- pop_2020 - pop_1990
terra::plot(change, main = "Population Change 1990–2020")
} # }