GetMapTiles: download map tiles from specified map tile servers such as...

In RgoogleMaps: Overlays on Static Maps

Description

Query the server for map tiles, defined uniquely by their

X and Y ID and zoom. For offline usage, these map tiles are stored in a local directory

Usage

GetMapTiles(center = c(lat = 52.431635, lon = 13.194773), lonR, 


    latR, nTiles = c(3, 3), zoom = 13, urlBase = c("http://a.tile.openstreetmap.org/", 


        "http://mt1.google.com/vt/lyrs=m")[1], CheckExistingFiles = TRUE, 


    TotalSleep = NULL, tileExt = ".png", tileDir = "~/mapTiles/OSM/", 


    returnTiles = FALSE, verbose = 0)

Arguments

center	optional center (lat first,lon second )
lonR	longitude range
latR	latitude range
nTiles	number of tiles in x and y direction
zoom	Google maps zoom level.
urlBase	tileserver URL
CheckExistingFiles	logical, if TRUE check if files already exist and only download if not!
TotalSleep	overall time (in seconds) that one is willing to add in between downloads. This is intended to lower the risk of a server denial. If NULL no call to Sys.sleep is executed
tileExt	image type of tile
tileDir	map tiles are stored in a local directory
returnTiles	return tiles in a list?
verbose	level of verbosity

Value

list with important information

Note

Note that size is in order (lon, lat)

Author(s)

Markus Loecher

See Also

GetMap.bbox

Examples

if (0){


tmp=GetMapTiles("World Trade Center, NY", zoom=15,nTiles = c(5,5), verbose=1)


PlotOnMapTiles(tmp)


tmp=GetMapTiles("World Trade Center, NY", zoom=16,nTiles = c(20,20), verbose=1)





tmp2=GetMapTiles("World Trade Center, NY", zoom=15,nTiles = c(5,5), verbose=1,


                urlBase = "http://mt1.google.com/vt/lyrs=m", 


                tileDir= "~/mapTiles/Google/")


tmp=GetMapTiles("Hoboken, NJ", zoom=16,nTiles = c(30,30), verbose=1,


                urlBase = "http://mt1.google.com/vt/lyrs=m", 


                tileDir= "~/mapTiles/Google/")


PlotOnMapTiles(tmp2)





tmp2=GetMapTiles("Werderscher Markt 15, 10117 Berlin", zoom=15,nTiles = c(20,20), verbose=0,


                 urlBase = "http://mt1.google.com/vt/lyrs=m", 


                 tileDir= "~/mapTiles/Google/")


###combine with leaflet:


#From:http://stackoverflow.com/questions/5050851/


#     best-lightweight-web-server-only-static-content-for-windows


#To use Python as a simple web server just change your working 


#directory to the folder with your static content and type 


#python -m SimpleHTTPServer 8000, everything in the directory


#will be available at http:/localhost:8000/


  


library(leaflet)


m = leaflet::leaflet() %>% 


  addTiles( urlTemplate = "http:/localhost:8000/mapTiles/OSM/{z}_{x}_{y}.png")


m = leaflet::leaflet() %>% 


  addTiles( urlTemplate = "http:/localhost:8000/mapTiles/Google/{z}_{x}_{y}.png")


m = m %>% leaflet::setView(-74.01312, 40.71180, zoom = 16)


m = m %>% leaflet::addMarkers(-74.01312, 40.71180)





#Quadriga:


m = m %>% leaflet::setView(13.39780, 52.51534, zoom = 16)


m = m %>% leaflet::addMarkers(13.39780, 52.51534)


}

RgoogleMaps documentation built on May 2, 2019, 5:03 p.m.