Fixing maps library data for Pacific centred (0°-360° longitude) display

Question

I\'m plotting some points on a map of the world using the R maps package, something like:

Answer 1

install the latest version of maps (3.2.0).

do this:

d$lon2 <- ifelse(d$lon < -25, d$lon + 360, d$lon) # where d is your df
mapWorld <- map_data('world', wrap=c(-25,335), ylim=c(-55,75))

ggplot() +
geom_polygon(data = mapWorld, aes(x=long, y = lat, group = group)) +
geom_point(data = d, aes(x = lon2, y = lat))