cgps-leaflet-canvas-marker

1.0.0 • Public • Published

Leaflet.Canvas-Markers

Leaflet plugin for displaying markers on canvas instead of DOM. Working with Leaflet 1.0.0 and above.

Demo

There's a demo for 10000 points, running on Canvas

Installation and basic usage

Just download leaflet.canvas-markers.js from the dist folder and attach it to your project.

<script src="leaflet.canvas-markers.js"></script>

Now attach layer to map and some markers.

// Adds a layer
var ciLayer = L.canvasIconLayer({}).addTo(map);

// Marker definition
var marker =  L.marker([58.5578, 29.0087], {icon: icon});

// Adding marker to layer
ciLayer.addMarker(marker);

Benchmark

Plugin was tested in Google Chrome v59. There is results for 100000 markers:

Parameter Default Leaflet Markers Leaflet.Canvas-Markers
Memory used up to 2.8 Gb about 300 Mb
First load time 160-200 seconds 7 seconds
Zoom and move time more than 3 minutes 0.5 seconds

As you can see DOM operations are slow, so you should use canvas for a large number of markers.

You can also use L.circleMarker for your points with similar performance, but then you're limited to icon design.

Methods

  • addMarker(marker): Adds a marker to the layer.
  • removeMarker(marker, redraw): Removes a marker from the layer. Set redraw to true if you want to redraw layer after marker remove
  • redraw(): Redraws the layer

I also implemented binds for default addLayer and removeLayer (equal to removeMarker(marker, true) methods.

Dependencies (0)

    Dev Dependencies (1)

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    Install

    npm i cgps-leaflet-canvas-marker

    Weekly Downloads

    1

    Version

    1.0.0

    License

    MIT

    Last publish

    Collaborators

    • cgps-admin