country_halos: Pre-computed Equal-Area Country Halos
Description
A named list of pre-computed halo geometries for each country where the
halo area equals the country area (area proportion = 1). These halos
account for land masking (sea areas excluded).
Usage
country_halos
Arguments
Format
A named list with ISO3 country codes as names. Each element is
either an sfc geometry (POLYGON or MULTIPOLYGON) in WGS84, or NULL
if computation failed for that country.
Details
Each halo is a "donut" shape: the area between the original country
boundary and the expanded boundary, clipped to land.