Add a Graticule on the map see <a href='https://github.com/turban/Leaflet.Graticule'>https://github.com/turban/Leaflet.Graticule</a>

Add a Graticule on the map see https://github.com/turban/Leaflet.Graticule

addGraticule(map, interval = 20, sphere = FALSE, style = list(color =
  "#333", weight = 1), layerId = NULL, group = NULL,
  options = pathOptions(pointerEvents = "none", clickable = FALSE))

Arguments

map	a map widget object
interval	The spacing in map units between horizontal and vertical lines.
sphere	boolean. Default FALSE
style	path options for the generated lines. See http://leafletjs.com/reference-1.3.1.html#path-option
layerId	the layer id
group	the name of the group this layer belongs to.
options	the path options for the graticule layer

Examples

leaf <- leaflet() %>%
  addTiles() %>%
  addGraticule()
leaf