map('france', fill = TRUE, col = 1:10)
# replace by a public domain map at higher resolution:
# fr1 <- rnaturalearth::ne_states("france")
# this still includes overseas domains, so we remove those:
# france2 <- map(fr1, xlim=c(-20, 20), ylim=c(30, 60), lforce="e",
# fill=TRUE, plot=FALSE)
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