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Land Mask for PRIO-GRID Cells (Natural Earth)

Source: R/data_naturalearth.R
gen_naturalearth_cover.Rd

Generates a binary raster mask indicating which PRIO-GRID cells intersect with land, based on the Natural Earth land dataset. By default, any nonzero land coverage qualifies a cell as land. The minimum proportion of land cover required to classify a cell as land can be adjusted with min_cover.

Usage

gen_naturalearth_cover(min_cover = 0)

Arguments

min_cover

Numeric, default 0. Minimum fraction of a grid cell that must be covered by land for the cell to be classified as land. Should be between 0 and 1.

Value

A single-layer SpatRaster object

Details

The function:

  • Calls gen_naturalearth_cover_share to compute the fractional land cover of each grid cell

  • Sets cells with land coverage below min_cover to NA

  • Returns a raster aligned to PRIO-GRID resolution with non-NA values representing land cells

References

Natural Earth (2024). “Land. 10m Physical. Made with Natural Earth. Free Vector and Raster Map Data.”

Examples

if (FALSE) { # \dontrun{
# Generate default land mask
land_mask <- gen_naturalearth_cover()
terra::plot(land_mask, main = "PRIO-GRID Land Mask (Natural Earth)")

# Require 50% land cover to classify as land
land_mask50 <- gen_naturalearth_cover(min_cover = 0.5)
terra::plot(land_mask50, main = "PRIO-GRID Land Mask (≥50% Land)")
} # }