All are RasterLayer layer with the distance (metres) to the Natural Earth
coastline.
To find the dimensions, extent, resolution, data properties, and metadata
use the raster package functions - most of this information will be printed by default.
distance_to_coastline_lowres Scale 110 rnaturalearth::ne_coastline(scale = 110).
distance_to_coastline_50 Scale 50 rnaturalearth::ne_coastline(scale = 50).
distance_to_coastline_10 Scale 10 rnaturalearth::ne_coastline(scale = 110).