Spatial lines in the standard (71S) South Polar projection. Data is the 'rnaturalearth ne_coastline' at 'scale = 10'.
polar_map(crs = commonprojections$polar)
PROJ.4 string
SpatialLinesDataFrame
Use 'crs' to modify the projection, or set to 'NA' to leave in longlat.
plot(polar_map())
#> Warning: NULL source CRS comment, falling back to PROJ string