library('maps')##
## # ATTENTION: maps v3.0 has an updated 'world' map. #
## # Many country borders and names have changed since 1990. #
## # Type '?world' or 'news(package="maps")'. See README_v3. #us <- fortify(map_data('state'), region = 'region')
gg <-
(ggplot()
+ geom_map(data = us, map = us,
aes(x = long, y = lat, map_id = region, group = group),
fill = 'white', color = 'black', size = 0.25)
+ coord_map('albers', lat0 = 39, lat1 = 45)
+ theme_map()
)
gg