Add an underlying base map to ggplot maps

Wrapper around ggmap::get_stadiamap() that makes it easy to insert a base map underneath a ggplot-based map. The default map type (Stamen's Toner Lite map) is designed to be unintrusive so the focus remains on the data being visualised.

Usage

add_map_e61(
  bbox = c(top = -33.757742, right = 151.492882, bottom = -34.024779, left = 150.839539),
  adjust = 0,
  maptype = "stamen_toner_lite"
)

Arguments

bbox

A named vector of numeric coordinates defining the extent of your map, e.g c(top = -33, right = 151, bottom = -34, left = 150). Defaults to bounds for Greater Sydney.

adjust

Numeric. Adjust default zoom value.

maptype

Character. Select a valid map type from ggmap::get_stadiamap()'s maptype argument. The default is set to stamen_toner_lite.

Value

A ggmap object

See also

Other map functions: crop_aus_coord(), setup_stadia_maps(), theme_e61_spatial()

Examples

library(sf)
#> Error in library(sf): there is no package called ‘sf’
sa3 <- strayr::read_absmap("sa32021")
#> Error in loadNamespace(x): there is no package called ‘strayr’
sa3 <- sa3[sa3$gcc_code_2021 == "1GSYD", ] # let's just look at Sydney
#> Error: object 'sa3' not found

 ggplot(sa3) +
 add_map_e61(bbox = c(
   left = min(sa3$cent_long),
   bottom = min(sa3$cent_lat),
   right = max(sa3$cent_long),
   top = max(sa3$cent_lat))
   ) +
 geom_point(aes(x = cent_long, y = cent_lat)) + #plot points
 theme_e61_spatial()
#> Error: object 'sa3' not found