cartography (version 1.2)

getTiles: Get Tiles from Open Map Servers

Description

Get map tiles based on a Spatial*DataFrame extent. Maps can be fetched from various open map servers.

Usage

getTiles(spdf, type = "osm", zoom = NULL, crop = FALSE)

Arguments

spdf

a Spatial*DataFrame with a valid projection attribute.

type

the tile server from which to get the map, one of "hikebike", "hotstyle", "lovinacycle", "lovinahike", "mapquestosm", "mapquestsat", "opencycle", "openpiste", "osm", "osmgrayscale", "osmtransport", "stamenbw", "stamenwatercolor", "thunderforestlandscape

zoom

the zoom level. If null, it is determined automatically (see Details).

crop

TRUE if results should be cropped to the specified spdf extent, FALSE otherwise.

Value

• A RatserBrick is returned.

Details

Zoom levels are descibed on the OpenStreetMap wiki: http://wiki.openstreetmap.org/wiki/Zoom_levels.

See Also

tilesLayer

Examples

data("nuts2006")
# extract Denmark
spdf <- nuts0.spdf[nuts0.spdf$id=="DK",]   
# Download the tiles, extent = Denmark 
den <- getTiles(spdf = spdf, type = "osm", crop = TRUE)
class(den)
# Plot the tiles
tilesLayer(den)
# Plot countries
plot(spdf, add=TRUE)
# Map tiles sources
mtext(text = "Map data © OpenStreetMap contributors, under CC BY SA.",
      side = 1, adj = 0, cex = 0.7, font = 3)