Get tiles by zoom, by overall dimension, or by buffer on a single point.
get_tiles_zoom(x, zoom = 0, ..., format = "png")
get_tiles_dim(x, dim = c(512, 512), ..., format = "png")
get_tiles_buffer(x, buffer = NULL, ..., max_tiles = 9, format = "png")a spatial object with an extent
desired zoom for tiles, use with caution - cannot be unset in get_tiles_zoom
passed to get_tiles()
defaults to "png", also available is "jpg"
for get_tiles_dim the overall maximum dimensions of the image (padded out to tile size of 256x256)
width in metres to extend around the location, ignored if 'x' is a spatial object with extent
maximum number of tiles - if NULL is set by zoom constraints
A list with files downloaded in character vector, a data frame of the tile indices, the zoom level used and the extent in xmin,xmax,ymin,ymax form.
Each function expects an extent in longitude latitude or a spatial object with extent as the first argument.
get_tiles_zoom() requires a zoom value, defaulting to 0
get_tiles_dim() requires a dim value, default to c(512, 512), a set of 4 tiles
get_tiles_buffer() requires a single location (longitude, latitude) and a buffer in metres
get_tiles
if (!is.null(get_api_key())) {
ex <- ext(146, 147, -43, -42)
tile_infoz <- get_tiles_zoom(ex, zoom = 1)
tile_infod <- get_tiles_dim(ex, dim = c(256, 256))
tile_infob <- get_tiles_buffer(cbind(146.5, -42.5), buffer = 5000)
}
#> Warning: no mapbox key found
#>
#> To set your Mapbox API key obtain a key from https://account.mapbox.com/access-tokens/
#>
#> 1) Run this to set for the session 'Sys.setenv(MAPBOX_API_KEY=<yourkey>)'
#>
#> OR,
#>
#> 2) To set permanently store 'MAPBOX_API_KEY=<yourkey>' in ~/.Renviron
#>
#> See 'help(ceramic::get_api_key)'