get_map is a smart wrapper that queries the Google Maps,
OpenStreetMap, Stamen Maps or Naver Map servers for a map.
get_map(location = c(lon = -95.3632715, lat = 29.7632836),
zoom = "auto", scale = "auto", maptype = c("terrain",
"terrain-background", "satellite", "roadmap", "hybrid", "toner",
"watercolor", "terrain-labels", "terrain-lines", "toner-2010",
"toner-2011", "toner-background", "toner-hybrid", "toner-labels",
"toner-lines", "toner-lite"), source = c("google", "osm", "stamen"),
force = ifelse(source == "google", TRUE, FALSE), messaging = FALSE,
urlonly = FALSE, filename = NULL, crop = TRUE, color = c("color",
"bw"), language = "en-EN", ...)a ggmap object (a classed raster object with a bounding box attribute)
an address, longitude/latitude pair (in that order), or left/bottom/right/top bounding box
map zoom, an integer from 3 (continent) 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. maps of the whole world currently not supported.
scale argument of get_googlemap or
get_openstreetmap
character string providing map theme. options available are "terrain", "terrain-background", "satellite", "roadmap", and "hybrid" (google maps), "terrain", "watercolor", and "toner" (stamen maps), or a positive integer for cloudmade maps (see ?get_cloudmademap)
Google Maps ("google"), OpenStreetMap ("osm"), Stamen Maps ("stamen")
force new map (don't use archived version)
turn messaging on/off
return url only
destination file for download (file extension added according
to format). Default NULL means a random tempfile.
(stamen and cloudmade maps) crop tiles to bounding box
color ("color") or black-and-white ("bw")
language for google maps
...
David Kahle david.kahle@gmail.com
ggmap, GetMap in package RgoogleMaps