Day 12 of 30DayMapChallenge : « scales » (previously).
French « départements » at the same size but tidily ordered by area.
library(tidyverse)
library(sf)
library(units)
library(tmap)
# data from https://geoservices.ign.fr/adminexpress
fr <- read_sf("~/adminexpress.gpkg",
layer = "departement")
png("scales.png", width = 20, height = 12.36, units = "cm", res = 300)
fr %>%
mutate(surf_km2 = set_units(st_area(geom), km^2),
rank = dense_rank(surf_km2),
nom_dep = fct_rev(fct_reorder(as_factor(nom_dep), rank))) %>%
tm_shape() +
tm_polygons(fill = "lightgrey") +
tm_facets(by = "nom_dep", free.scales = TRUE)
dev.off()
