Ggmap from sf to data.frame

A wrapper function to quickly get plottable ggmap basemap clipped to padded bbox of sf object.

ps_sf_ggmap_df(x, pad, source, maptype)

Arguments

x

A sf object

pad

A numeric vector indicating amount in metres to pad bbox. If vector of length 1, that amount is added to all sides; if vector of length 4 amount is added to left, top, right and bottom, respectively.

source

Google Maps ("google"), OpenStreetMap ("osm"), Stamen Maps ("stamen"), or CloudMade maps ("cloudmade")

maptype

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).

Value

A data.frame object which can be plotted using: ggplot2::geom_point(data = x, aes(x = x, y = y, col = rgb(layer.1/255, layer.2/255, layer.3/255))).