different options for rendering tiles in R leaflet

leaflet_labels_options.R

# OSM tile with no labels
osm_nolabels <- "https://tiles.wmflabs.org/osm-no-labels/{z}/{x}/{y}.png"

# OSM humanitarian tile (just for ref)
osm_hot <- "http://a.tile.openstreetmap.fr/hot/{z}/{x}/{y}.png"

# if you a mapping a choropleth with polygons, this will render place labels above the polygons
leaflet() %>% 
  addMapPane(name = "polygons", zIndex = 410) %>% 
  addMapPane(name = "maplabels", zIndex = 420) %>% # higher zIndex rendered on top
  addTiles(urlTemplate = osm_nolabels) %>% 
  addProviderTiles("CartoDB.PositronOnlyLabels", options = leafletOptions(pane = "maplabels"), group = "Place names") %>%
  addPolygons(...) %>%
  addLayersControl(overlayGroups = c("Place names"), options = layersControlOptions(collapsed = FALSE))