Mercator Tiles

Usage

bt_tiles(
  bertin,
  style = "opentopomap",
  zoomDelta = 0,
  tileSize = 512,
  opacity = 1,
  clip,
  source = c(100, 200),
  increasetilesize = 1,
  display = 1
)

Arguments

bertin: map object
style: tile style'openstreetmap', 'opentopomap', 'worldterrain', 'worldimagery', 'worldStreet', 'worldphysical', 'shadedrelief', 'oceanbasemap'
zoomDelta: zoom offset
tileSize: tile size
opacity: opacity of the object
clip: a boolean to avoid artifacts of discontinuous projection
source: position of the text. It can be an array with x,y coordinates. For example [100,200]. It can be also a string defining the position.'topleft', 'top', 'topright', 'left', 'middle', 'right', 'bottomleft', 'bottom', 'bottomright'
increasetilesize: a value to slightly increase the size of the tiles solve the problem of gap between the tiles with chromium
display: Boolean to allow to show or hide the layer. This parameter has no effect on the calculation of the extent

Value

map object

Examples

library(sf)
world <- st_read(system.file("gpkg/world.gpkg", package = "bertin"),
                 layer = "world", quiet = TRUE)
italy <- world[world$name == "Italy",]
bt_param(projection = "Mercator", clip = TRUE, extent = italy) |>
  bt_tiles(style = "worldphysical") |>
  bt_draw()