OpenStreetMap (version 0.4.0)

openmap: Get a map based on lat long coordinates

Description

Get a map based on lat long coordinates

Usage

openmap(
  upperLeft,
  lowerRight,
  zoom = NULL,
  type = c("osm", "bing", "osm-german", "esri", "esri-topo", "esri-physical",
    "esri-shaded", "esri-imagery", "esri-terrain", "esri-natgeo", "nps", "apple-iphoto",
    "osm-public-transport"),
  minNumTiles = 9L,
  mergeTiles = TRUE
)

Arguments

upperLeft

the upper left lat and long

lowerRight

the lower right lat and long

zoom

the zoom level. If null, it is determined automatically

type

the tile server from which to get the map, or the url pattern.

minNumTiles

If zoom is null, zoom will be chosen such that the number of map tiles is greater than or equal to this number.

mergeTiles

should map tiles be merged into one tile

Details

Type may be the url of a custom tile server (http://wiki.osgeo.org/wiki/Tile_Map_Service_Specification). should include {z}, {y}, and {x} specifying where the zoom, xtile and ytile location should be substituted. e.g.

http://api.someplace.com/.../{z}/{x}/{y}.png

Examples

if (FALSE) {
#show some of the maps available
nm <- c("osm","bing","osm-german","esri","esri-topo","esri-physical","esri-shaded",
  "esri-imagery","esri-terrain","esri-natgeo","nps","apple-iphoto")
par(mfrow=c(3,4), mar=c(0,0,0,0))
#Korea
for(i in 1:length(nm)){
	map <- openmap(c(43.46886761482925,119.94873046875),
			c(33.22949814144951,133.9892578125),
		minNumTiles=3,type=nm[i])
plot(map)
}
# Some maps from custom urls (use your own API key)
apiKey <- paste0("?access_token=",
 "pk.eyJ1IjoidGhlZmVsbCIsImEiOiJjaXN1anNwODEwMWlrMnRvZHBhamRrZjlqIn0.Gf8qLSpZ6yo5yfQhEutFfQ")
baseUrl <- "https://api.mapbox.com/styles/v1/mapbox/satellite-streets-v9/tiles/256/{z}/{x}/{y}"
map <- openmap(c(43.46886761482925,119.94873046875),
	c(33.22949814144951,133.9892578125),
		minNumTiles=4,
		type=paste0(baseUrl,apiKey))
plot(map)

baseUrl <- "https://api.mapbox.com/styles/v1/mapbox/dark-v9/tiles/256/{z}/{x}/{y}"
map <- openmap(c(43.46886761482925,119.94873046875),
	c(33.22949814144951,133.9892578125),
		minNumTiles=4,
		type=paste0(baseUrl,apiKey))
plot(map)


#plot Korea with ggplot2.
library(ggplot2)
map <- openmap(c(43.46886761482925,119.94873046875),
	c(33.22949814144951,133.9892578125),
	minNumTiles=4)
autoplot(map)

}