computes the necessary number of tiles from a bounding box and a zoom level
computes the necessary number of tiles from a bounding box and a zoom level
NumTiles(lonR, latR, zoom = 13, CheckExistingFiles = TRUE,
tileExt = ".png", tileDir = "~/mapTiles/OSM/",
verbose = 0)lonR |
longitude range |
latR |
latitude range, |
zoom |
zoom level |
CheckExistingFiles |
logical, if TRUE check if files already exist and only download if not! |
tileExt |
image type of tile |
tileDir |
map tiles are stored in a local directory, e.g. "~/mapTiles/Google/" |
verbose |
level of verbosity |
tuple with number of tiles for lon and lat extent
Markus Loecher
if (0){
#US bounding box:
for (zoom in 4:15) {
cat("OSM, zoom =", zoom, "\n")
NumTiles(lonR=c(-135,-66), latR=c(25,54) , zoom=zoom)
}
for (zoom in 4:15) {
cat("Google, zoom =", zoom, "\n")
NumTiles(lonR=c(-135,-66), latR=c(25,54) , zoom=zoom, tileDir= "~/mapTiles/Google/")
}
}Please choose more modern alternatives, such as Google Chrome or Mozilla Firefox.