I was wondering why this "standard" way of drawing a world map shows data beyond +180 degrees longitude (top right corner):
library(maps)
library(ggplot2)
world <- map_data("world")
worldmap <- ggplot(world, aes(long, lat))
worldmap <- worldmap + geom_polygon(fill = "#ffeda0", colour = "black",aes(group = group))
worldmap <- worldmap + scale_x_continuous(name="Longitude",expand=c(0,0),breaks=seq(-180,190,10))
worldmap <- worldmap + scale_y_continuous(name="Latitude",expand=c(0,0),breaks=seq(-90,90,10))
worldmap <- worldmap + theme_bw() + theme(panel.background = element_rect(fill="#A3CCFF"))
print(worldmap)