Add additional panes to leaflet map to control layer order
map panes can be created by supplying a name and a zIndex to control layer
ordering. We recommend a zIndex value between 400 (the default
overlay pane) and 500 (the default shadow pane). You can then use this pane
to render overlays (points, lines, polygons) by setting the pane
argument in leafletOptions. This will give you control
over the order of the layers, e.g. points always on top of polygons.
If two layers are provided to the same pane, overlay will be determined by
order of adding. See examples below.
See https://leafletjs.com/reference-1.3.4.html#map-pane for details.
If the error "Cannot read property 'appendChild' of undefined" occurs, make sure the pane being used for used for display has already been added to the map.
addMapPane(map, name, zIndex)
map |
A |
name |
The name of the new pane (refer to this in |
zIndex |
The zIndex of the pane. Panes with higher index are rendered above panes with lower indices. |
rand_lng <- function(n = 10) rnorm(n, -93.65, .01)
rand_lat <- function(n = 10) rnorm(n, 42.0285, .01)
random_data <- data.frame(
lng = rand_lng(50),
lat = rand_lat(50),
radius = runif(50, 50, 150),
circleId = paste0("circle #", 1:50),
lineId = paste0("circle #", 1:50)
)
# display circles (zIndex: 420) above the lines (zIndex: 410), even when added first
leaflet() %>%
addTiles() %>%
# move the center to Snedecor Hall
setView(-93.65, 42.0285, zoom = 14) %>%
addMapPane("ames_lines", zIndex = 410) %>% # shown below ames_circles
addMapPane("ames_circles", zIndex = 420) %>% # shown above ames_lines
# points above polygons
addCircles(
data = random_data, ~lng, ~lat, radius = ~radius, popup = ~circleId,
options = pathOptions(pane = "ames_circles")
) %>%
# lines in 'ames_lines' pane
addPolylines(
data = random_data, ~lng, ~lat, color = "#F00", weight = 20,
options = pathOptions(pane = "ames_lines")
)
# same example but circles (zIndex: 420) are below the lines (zIndex: 430)
leaflet() %>%
addTiles() %>%
# move the center to Snedecor Hall
setView(-93.65, 42.0285, zoom = 14) %>%
addMapPane("ames_lines", zIndex = 430) %>% # shown below ames_circles
addMapPane("ames_circles", zIndex = 420) %>% # shown above ames_lines
# points above polygons
addCircles(
data = random_data, ~lng, ~lat, radius = ~radius, popup = ~circleId,
options = pathOptions(pane = "ames_circles")
) %>%
# lines in 'ames_lines' pane
addPolylines(
data = random_data, ~lng, ~lat, color = "#F00", weight = 20,
options = pathOptions(pane = "ames_lines")
)Please choose more modern alternatives, such as Google Chrome or Mozilla Firefox.