leaflet.heat

A tiny and fast Leaflet heatmap plugin.

Leaflet.heat

A tiny, simple and fast Leaflet heatmap plugin. Uses simpleheat under the hood, additionally clustering points into a grid for performance.

var heat = L.heatLayer(latlngs, {radius: 25}).addTo(map);

To include the plugin, just use leaflet-heat.js from the dist folder:

<script src="leaflet-heat.js"></script>

To build the dist files run: npm install && npm run prepublish

Constructs a heatmap layer given an array of LatLng points and an object with the following options:

  • minOpacity - the minimum opacity the heat will start at
  • maxZoom - zoom level where the points reach maximum intensity (as intensity scales with zoom), equals maxZoom of the map by default
  • max - maximum point intensity, 1.0 by default
  • radius - radius of each "point" of the heatmap, 25 by default
  • blur - amount of blur, 15 by default
  • gradient - color gradient config, e.g. {0.4: 'blue', 0.65: 'lime', 1: 'red'}

Optional third argument in each LatLng point (altitude) represents point intensity.

  • setOptions(options): Sets new heatmap options and redraws it.
  • addLatLng(latlng): Adds a new point to the heatmap and redraws it.
  • setLatLngs(latlngs): Resets heatmap data and redraws it.
  • redraw(): Redraws the heatmap.
  • Added compatibility with Leaflet 0.8-dev.
  • Fixed overlaying two heatmaps on top of each other.
  • Fixed rare animation issues.
  • Added addLatLng, setLatlngs, setOptions and redraw methods.
  • Added max option and support for different point intensity values (through LatLng third argument).
  • Added gradient option to customize colors.
  • Initial release.