World Country Polygons with Pre-calculated AoE Bounds

An sf object containing country polygons from Natural Earth (1:50m scale) with pre-calculated bounding boxes for area of effect analysis.

Usage

countries

An sf data frame with 237 rows and 9 variables:

iso2: ISO 3166-1 alpha-2 country code (e.g., "FR", "BE")
iso3: ISO 3166-1 alpha-3 country code (e.g., "FRA", "BEL")
name: Country name
continent: Continent name
bbox: Original bounding box (xmin, ymin, xmax, ymax) in Mollweide
bbox_equal_area: AoE bounding box at scale sqrt(2)-1 (equal areas)
bbox_equal_ray: AoE bounding box at scale 1 (equal linear distance)
halo_equal_area_scale: Scale factor that produces halo area = country area (with land mask)
geometry: Country polygon in WGS84 (EPSG:4326)

# Get France
france <- countries[countries$iso3 == "FRA", ]

# Use directly with aoe()