Use different center than the prime meridian in plotting a world map

by

This may be somewhat tricky but you can do by:

mp1 <- fortify(map(fill=TRUE, plot=FALSE))
mp2 <- mp1
mp2$long <- mp2$long + 360
mp2$group <- mp2$group + max(mp2$group) + 1
mp <- rbind(mp1, mp2)
ggplot(aes(x = long, y = lat, group = group), data = mp) + 
  geom_path() + 
  scale_x_continuous(limits = c(0, 360))

enter image description here

By this setup you can easily set the center (i.e., limits):

ggplot(aes(x = long, y = lat, group = group), data = mp) + 
  geom_path() + 
  scale_x_continuous(limits = c(-100, 260))

enter image description here

UPDATED

Here I put some explanations:

The whole data looks like:

ggplot(aes(x = long, y = lat, group = group), data = mp) + geom_path()

enter image description here

but by scale_x_continuous(limits = c(0, 360)), you can crop a subset of the region from 0 to 360 longitude.

And in geom_path, the data of same group are connected. So if mp2$group <- mp2$group + max(mp2$group) + 1 is absent, it looks like:
enter image description here

More Related Contents:

  1. Issue when passing variable with dollar sign notation ($) to aes() in combination with facet_grid() or facet_wrap()
  2. Changing fonts in ggplot2
  3. “for” loop only adds the final ggplot layer
  4. How to use facets with a dual y-axis ggplot
  5. What is the width argument in position_dodge?
  6. Label points in geom_point
  7. geom_rect and alpha – does this work with hard coded values?
  8. Nested facets in ggplot2 spanning groups
  9. ggplot2: histogram with normal curve
  10. How to draw lines outside of plot area in ggplot2?
  11. add “floating” axis labels in facet_wrap plot
  12. creating “radar chart” (a.k.a. star plot; spider plot) using ggplot2 in R
  13. Plot over multiple pages
  14. Making a stacked area plot using ggplot2
  15. How do I show the y value on tooltip while hover in ggplot2
  16. Seeking workaround for gtable_add_grob code broken by ggplot 2.2.0
  17. how to show a legend on dual y-axis ggplot
  18. Different colours of geom_line above and below a specific value
  19. use ggpairs to create this plot
  20. Reverse datetime (POSIXct data) axis in ggplot
  21. R – ggplot2 issues with date as character for x-axis
  22. ggplot2: Setting geom_bar baseline to 1 instead of zero
  23. Combined plot of ggplot2 (Not in a single Plot), using par() or layout() function? [duplicate]
  24. Plot background colour in gradient
  25. How to automatically adjust the width of each facet for facet_wrap?
  26. Is it possible to jitter two ggplot geoms in the same way?
  27. Draw lines between different elements in a stacked bar plot
  28. How to change stacking order in stacked bar chart in R?
  29. What does the error “arguments imply differing number of rows: x, y” mean?
  30. Change the position of the strip label in ggplot from the top to the bottom?

Leave a Comment