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library(rnaturalearth) | |
library(mapsf) | |
library(fisheye) | |
ct <- ne_download(scale = 50, returnclass = "sf") | |
oc <- ne_download(type = "ocean", category = "physical", | |
scale = 50, returnclass = "sf") | |
x <- st_transform(ct, "+proj=natearth2") | |
z <- st_transform(oc, "+proj=natearth2") | |
mf_export(z, "initial.png", theme = "green") | |
mf_map(z, col = "white", border ="white", add = T) | |
mf_map(x, col = "lightblue", border = "white", lwd = .7, add = T) | |
mf_map(x, "POP_EST", "prop", border = "grey80", | |
inches = .3, leg_title = "Population", leg_frame = T) | |
mf_title("Original Map") | |
dev.off() | |
xCHN <- fisheye(x = x, centre = x[x$ADM0_A3 %in% "CHN",], k = 6) | |
zCHN <- fisheye(x = z, centre = x[x$ADM0_A3 %in% "CHN",], k = 6) | |
mf_export(zCHN, "china.png", theme = "green") | |
mf_map(zCHN, col = "white", border ="white", add = T) | |
mf_map(xCHN, col = "lightblue", border = "white", lwd = .7, add = T) | |
mf_map(xCHN, "POP_EST", "prop", border = "grey80", | |
inches = .3, leg_title = "Population", leg_frame = T) | |
mf_title("Transformed map, center = China") | |
dev.off() | |
xNGA <- fisheye(x = x, centre = x[x$ADM0_A3 %in% "NGA",], k = 6) | |
zNGA <- fisheye(x = z, centre = x[x$ADM0_A3 %in% "NGA",], k = 6) | |
mf_export(zNGA, "nigeria.png", theme = "green") | |
mf_map(zNGA, col = "white", border ="white", add = T) | |
mf_map(xNGA, col = "lightblue", border = "white", lwd = .7, add = T) | |
mf_map(xNGA, "POP_EST", "prop", border = "grey80", | |
inches = .3, leg_title = "Population", leg_frame = T) | |
mf_title("Transformed map, center = Nigeria") | |
dev.off() | |
xCHE <- fisheye(x = x, centre = x[x$ADM0_A3 %in% "CHE",], k = 6) | |
zCHE <- fisheye(x = z, centre = x[x$ADM0_A3 %in% "CHE",], k = 6) | |
mf_export(zCHE, "switzerland.png", theme = "green") | |
mf_map(zCHE, col = "white", border ="white", add = T) | |
mf_map(xCHE, col = "lightblue", border = "white", lwd = .7, add = T) | |
mf_map(xCHE, "POP_EST", "prop", border = "grey80", | |
inches = .3, leg_title = "Population", leg_frame = T) | |
mf_title("Transformed map, center = Switzerland") | |
dev.off() |
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A possible workflow could be: