Scales

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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()  
Départements
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