MapBackground function

get static Map from the Google server

MapBackground(lat, lon, destfile, NEWMAP = TRUE, myTile, 

    zoom = NULL, size = c(640, 640), GRAYSCALE = FALSE, 

    mar = c(0, 0, 0, 0), PLOT = FALSE, verbose = 1, 

    ...)

Arguments

• lat: center latitude
• lon: center longitude
• destfile: File to load the map image from or save to, depending on NEWMAP.
• NEWMAP: if TRUE, query the Google server and save to destfile, if FALSE load from destfile.
• myTile: map tile from previous downloads
• zoom: Google maps zoom level.
• size: desired size of the map tile image. defaults to maximum size returned by the Gogle server, which is 640x640 pixels
• GRAYSCALE: Boolean toggle; if TRUE the colored map tile is rendered into a black & white image, see RGB2GRAY
• mar: outer margin in plot; if you want to see axes, change the default
• PLOT: if TRUE, leave the plotting to PlotOnStaticMap , highly recommended
• verbose: level of verbosity
• ...: further arguments to be passed to GetMap.bbox

Returns

list containing the map tile

Author(s)

Markus Loecher