I want to project this map in robinson projection:
library(ggmap) world <- map_data("world") ggplot() + geom_path(data = world, aes(long, lat, group = group))
And I would like to change the projection to "Robinson" (following advice from answer to my previous question: What projection does the global climate region map from Wikipedia use?
I had a hard time finding a default implementation of this projection, I worked out the following for using the
library(proj4) robinson <- project(cbind(world$long, world$lat), proj = "+proj=robin +lon_0=0 +x_0=0 +y_0=0 +ellps=WGS84 +datum=WGS84 +units=m +no_defs")
I have tried a number of approaches, including:
# using ggmap::get.map() get_map("world", projection = mapprojection(robinson)) # using ggplot2::coord_map coord_map(projection = robinson) # and sp::coordinates: library(sp) coordinates(world) <- ~ lat + long gridded(world) <- TRUE # returns error proj4string(world) <- CRS(robinson)
but none of these work. Is it a typo, or I missing something fundamental about this method?