coastline lines at scales 1:110m (small), 1:50m (medium). 1:10m (large) are in the package rnaturalearthhires.
An object of class `sf`
An object of class sf (inherits from data.frame) with 134 rows and 4 columns.
An object of class sf (inherits from data.frame) with 1428 rows and 4 columns.
