Wrapper to load a ggmap

Usage

get_ggmap(
  coord,
  googlekey = NA,
  zoom = 12,
  mapstyle = c(feature = "all", element = "labels", visibility = "off"),
  maptype = "terrain",
  mapcolor = "bw",
  ...
)

Arguments

coord: a data.frame or tibble with coordinates (latlon) defining the map extensions in the form of coord = tibble(lon = ..., lat = ..., type = c("center", "lb", "rt", ...)); the reason for this structure is, that ggmap::get_googlemap() requires a different way (center + zoom) to specify the map frame than ggmap::get_stamenmap() (bounding box). If needed, coord is converted to bounding box by bbox() which takes type == "lb" as bottom & left coordinate, and "rt" as top & right, respectively.
googlekey: your google api key as a character string (see ?ggmap::get_googlemap(); then, a google map is downloaded) or, if NA, a map via ggmap::get_stamenmap() is returned
zoom: zoom factor for ggmap::get_googlemap()
mapstyle: style parameter for ggmap::get_googlemap()
maptype: parameter for ggmap::get_googlemap()
mapcolor: color parameter for ggmap::get_googlemap()
...: additional parameter for ggmap::get_googlemap() or ggmap::get_stamenmap(), respectively

Value

ggplot2 / ggmap object