Set options on layer groups

Change options on layer groups. Currently the only option is to control what zoom levels a layer group will be displayed at. The zoomLevels option is not compatible with layers control; do not both assign a group to zoom levels and use it with addLayersControl().

Usage

groupOptions(map, group, zoomLevels = NULL)

Arguments

map

the map to modify

group

character vector of one or more group names to set options on

zoomLevels

numeric vector of zoom levels at which group(s) should be visible, or TRUE to display at all zoom levels

Examples

pal <- colorQuantile("YlOrRd", quakes$mag)

leaflet() %>%
  # Basic markers
  addTiles(group = "basic") %>%
  addMarkers(data = quakes, group = "basic") %>%
  # When zoomed in, we'll show circles at the base of each marker whose
  # radius and color reflect the magnitude
  addProviderTiles(providers$Esri.WorldTopoMap, group = "detail") %>%
  addCircleMarkers(data = quakes, group = "detail", fillOpacity = 0.5,
    radius = ~mag * 5, color = ~pal(mag), stroke = FALSE) %>%
  # Set the detail group to only appear when zoomed in
  groupOptions("detail", zoomLevels = 7:18)
#> Assuming "long" and "lat" are longitude and latitude, respectively
#> Assuming "long" and "lat" are longitude and latitude, respectively