Large dataset of markers or dots in Leaflet [closed]

by

The performance issue is due to the fact that each marker is an individual DOM element. Browsers struggle in rendering thousands of them.

In your case, an easy workaround would be instead to use Circle Markers and have them rendered on a Canvas (e.g. using map preferCanvas option, or with a specific canvas renderer that you pass as renderer option for each of your Circle Marker). That is how Google Maps works by default: its markers are actually drawn on a Canvas.

var map = L.map('map', {
    preferCanvas: true
});
var circleMarker = L.circleMarker(latLng, {
    color: '#3388ff'
}).addTo(map);

or

var map = L.map('map');
var myRenderer = L.canvas({ padding: 0.5 });
var circleMarker = L.circleMarker(latLng, {
    renderer: myRenderer,
    color: '#3388ff'
}).addTo(map);

With this solution, each Circle Marker is no longer an individual DOM element, but instead is drawn by Leaflet onto a single Canvas, which is much easier to handle for the browser.

Furthermore, Leaflet still tracks the mouse position and related events and triggers the corresponding events on your Circle Markers, so that you can still listen to such events (like mouse click, etc.).

Demo with 100k points: https://jsfiddle.net/sgu5dc0k/

More Related Contents:

  1. Marker mouse click event in R leaflet for shiny
  2. Leaflet changing Marker color
  3. Determine if a point reside inside a leaflet polygon
  4. Using several Marker Cluster Groups displays overlapping Clusters
  5. Embedding a Leaflet map on a Blazor SPA
  6. Plotting 140K points in leafletjs
  7. Data-toggle tab does not download Leaflet map
  8. How to reference static assets within vue javascript
  9. Leaflet drawing tiles disjointly
  10. How to save Leaflet in R map as png or jpg file?
  11. Wrapping lines/polygons across the antimeridian in Leaflet.js
  12. Leaflet- marker click event works fine but methods of the class are undefined in the callback function
  13. refresh leaflet map: map container is already initialized
  14. Leaflet – How to find existing markers, and delete markers?
  15. Leaflet map not displayed properly inside tabbed panel
  16. Leaflet event: how to propagate to overlapping layers
  17. Storing Image Data for offline web application (client-side storage database)
  18. How to load a Google Maps baselayer in Leaflet (after june 2018)?
  19. How Do I connect two coordinates with a line using Leaflet in R
  20. Leaflet marker event fires at wrong time
  21. Leaflet map not showing properly in bootstrap 3.0 modal
  22. shiny leaflet ploygon click event
  23. Leaflet Legend for Custom Markers in R
  24. Can’t loop with R’s leaflet package to produce multiple maps
  25. Custom Markers for Matlab plot
  26. How to secure the JavaScript API Access Token?
  27. Leaflet Map API with Google Satellite Layer [duplicate]
  28. R: Add title to Leaflet map
  29. How to get a leaflet map canvas to have a 100% height?
  30. in R, leaflet don’t reflect the latitude nor longitude?

Leave a Comment