addGlPoints: Add Data to a leaflet map using Leaflet.glify

In leafgl: High-Performance 'WebGl' Rendering for Package 'leaflet'

Add Data to a leaflet map using Leaflet.glify

Description

Leaflet.glify is a WebGL renderer plugin for leaflet. See https://github.com/robertleeplummerjr/Leaflet.glify for details and documentation.

Usage

addGlPolylines(
  map,
  data,
  color = cbind(0, 0.2, 1),
  opacity = 0.6,
  group = "glpolylines",
  popup = NULL,
  label = NULL,
  weight = 1,
  layerId = NULL,
  src = FALSE,
  pane = "overlayPane",
  popupOptions = NULL,
  labelOptions = NULL,
  contextMenu = NULL,
  ...
)

addGlPoints(
  map,
  data,
  fillColor = "#0033ff",
  fillOpacity = 0.8,
  radius = 10,
  group = "glpoints",
  popup = NULL,
  label = NULL,
  layerId = NULL,
  src = FALSE,
  pane = "overlayPane",
  popupOptions = NULL,
  labelOptions = NULL,
  contextMenu = NULL,
  ...
)

addGlPolygons(
  map,
  data,
  color = cbind(0, 0.2, 1),
  fillColor = color,
  fillOpacity = 0.8,
  group = "glpolygons",
  popup = NULL,
  label = NULL,
  layerId = NULL,
  src = FALSE,
  pane = "overlayPane",
  stroke = TRUE,
  popupOptions = NULL,
  labelOptions = NULL,
  contextMenu = NULL,
  ...
)

Arguments

map	a map widget object created from leaflet()
data	sf/sp point/polygon/line data to add to the map.
color	Object representing the color. Can be of class integer, character with color names, HEX codes or random characters, factor, matrix, data.frame, list, json or formula. See the examples or makeColorMatrix for more information.
opacity	feature opacity. Numeric between 0 and 1. Note: expect funny results if you set this to < 1.
group	the name of the group the newly created layers should belong to (for clearGroup() and addLayersControl() purposes). Human-friendly group names are permitted–they need not be short, identifier-style names. Any number of layers and even different types of layers (e.g., markers and polygons) can share the same group name.
popup	Object representing the popup. Can be of type character with column names, formula, logical, data.frame or matrix, Spatial, list or JSON. If the length does not match the number of rows in the data, the popup vector is repeated to match the dimension.
label	a character vector of the HTML content for the labels
weight	line width/thickness in pixels for addGlPolylines.
layerId	the layer id
src	whether to pass data to the widget via file attachments.
pane	A string which defines the pane of the layer. The default is "overlayPane".
popupOptions	A Vector of popupOptions() to provide popups
labelOptions	A Vector of labelOptions() to provide label options for each label. Default NULL
contextMenu	a JS function, that is passed to contextmenu. See the example in ./inst/examples/contextmenu.R
...	Used to pass additional named arguments to write_json_str or write_geojson_str & to pass additional arguments to the underlying JavaScript functions. Typical use-cases include setting 'digits' to round the point coordinates or to pass a different 'fragmentShaderSource' to control the shape of the points. Use 'point' (default) to render circles with a thin black outline 'simpleCircle' for circles without outline 'square' for squares without outline Additional arguments could be 'sensitivity', 'sensitivityHover' or 'vertexShaderSource'. See a full list at the Leaflet.glify repository.
fillColor	fill color
fillOpacity	fill opacity
radius	point size in pixels.
stroke	whether to draw stroke along the path (e.g., the borders of polygons or circles)

Functions

• addGlPolylines(): Add Lines to a leaflet map using Leaflet.glify

• addGlPoints(): Add Points to a leaflet map using Leaflet.glify

• addGlPolygons(): Add Polygons to a leaflet map using Leaflet.glify

Shiny Inputs

The objects created with leafgl send input values to Shiny as the user interacts with them. These events follow the pattern input$MAPID_glify_EVENTNAME. The following events are available:

• Click Events: input$MAPID_glify_click

• Mouseover Events: input$MAPID_glify_mouseover

• Mouseout Events: input$MAPID_glify_mouseout

Each event returns a list containing:

• lat: Latitude of the object or mouse cursor

• lng: Longitude of the object or mouse cursor

• id: The layerId, if any

• group: The group name of the object

• data: The properties of the feature

Note

MULTILINESTRINGs and MULTIPOLYGONs are currently not supported! Make sure you cast your data to LINESTRING or POLYGON first using:

• sf::st_cast(data, "LINESTRING")

• sf::st_cast(data, "POLYGON")

Examples

library(leaflet)
library(leafgl)
library(sf)

storms = st_as_sf(atlStorms2005)
cols = heat.colors(nrow(storms))

leaflet() %>%
  addProviderTiles(provider = providers$CartoDB.Positron) %>%
  addGlPolylines(data = storms, color = cols, popup = TRUE, opacity = 1)


library(leaflet)
library(leafgl)
library(sf)

n = 1e5
df1 = data.frame(id = 1:n,
                 x = rnorm(n, 10, 1),
                 y = rnorm(n, 49, 0.8))
pts = st_as_sf(df1, coords = c("x", "y"), crs = 4326)
cols = topo.colors(nrow(pts))

leaflet() %>%
  addProviderTiles(provider = providers$CartoDB.DarkMatter) %>%
  addGlPoints(data = pts, fillColor = cols, popup = TRUE)

library(leaflet)
library(leafgl)
library(sf)

gadm = st_as_sf(gadmCHE)
gadm = st_cast(gadm, "POLYGON")
cols = grey.colors(nrow(gadm))

leaflet() %>%
  addProviderTiles(provider = providers$CartoDB.DarkMatter) %>%
  addGlPolygons(data = gadm, color = cols, popup = TRUE)

leafgl documentation built on April 15, 2026, 5:06 p.m.