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I am using ggmap and wish to have a map of the world centered on Australia to which I can easily plot geocoded points. ggmap seems to be a lot easier to use compared to some of the other mapping packages. Yet when I bring through a map using the code below it errors. gc <- geocode('australia') center <- as.numeric(gc) > map <- get_map(location = center, source="google", maptype="terrain", zoom=0) Error: zoom must be a whole number between 1 and 21 From the get_map help: "zoom: map zoom, an integer from 0 (whole world) to 21 (building), default value 10 (city). openstreetmaps limits a zoom of 18, and the limit on stamen maps depends on the maptype. 'auto' automatically determines the zoom for bounding box specifications, and is defaulted to 10 with center/zoom specifications." Changing the zoom to one does not error for get_map but does for plotting that map map <- get_map(location = center, source="google", maptype="terrain", zoom=1) ggmap(map) Warning messages: 1: In min(x) : no non-missing arguments to min; returning Inf 2: In max(x) : no non-missing arguments to max; returning -Inf 3: In min(x) : no non-missing arguments to min; returning Inf 4: In max(x) : no non-missing arguments to max; returning -Inf It looks like the longitude isn't being pulled through. Finally with a zoom of 2 it does work but does not bring through a map of the whole world So, my question is how can I use get_map to get a world map? Session info: sessionInfo() R version 2.15.0 (2012-03-30) Platform: i386-pc-mingw32/i386 (32-bit) locale: [1] LC_COLLATE=English_United Kingdom.1252 [2] LC_CTYPE=English_United Kingdom.1252 [3] LC_MONETARY=English_United Kingdom.1252 [4] LC_NUMERIC=C [5] LC_TIME=English_United Kingdom.1252 attached base packages: [1] stats graph

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