Creating a UK map with geom_polygon

问题

I am quite new to R and have recently been trying to create an outline of the UK in ggplot2 with the following code:

library(ggplot2)
UK <- map_data("world2Hires", region = "UK")
ggplot() + geom_polygon(data = UK, aes(x = long, y = lat, group = group)) +
coord_map()

Result of ggplot2 code:

This creates the map above as it does not take into account the longitude scale of the map and stretches it across the x-axis. The UK has a longitude that spans from -x to +x which is causing the problem here. I have not been able to find any way of fixing this so any help would be much appreciated.

Thanks!

回答1:

If you are not bound to world2Hires, you can do the following, which gives me the following:

library(ggplot2)
UK <- map_data(map = "world", region = "UK") # changed map to "world"
ggplot(data = UK, aes(x = long, y = lat, group = group)) + 
  geom_polygon() +
  coord_map()

Does that help you?

来源：https://stackoverflow.com/questions/40673461/creating-a-uk-map-with-geom-polygon