You can load the polygons directly with GeoIO.jl (explained in the book):
using GeoIO
geotable = GeoIO.load("file.shp")
area.(geotable.geometry)
You can load the polygons directly with GeoIO.jl (explained in the book):
using GeoIO
geotable = GeoIO.load("file.shp")
area.(geotable.geometry)