leaflet.heat

Leaflet.heat
==========

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

Demos

- 10,000 points →
- Adding points dynamically →

Basic Usage

``js
var heat = L.heatLayer([
[50.5, 30.5, 0.2], // lat, lng, intensity
[50.6, 30.4, 0.5],
...
], {radius: 25}).addTo(map);
`

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

`html

`

Building


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

Reference

#### L.heatLayer(latlngs, options)

Constructs a heatmap layer given an array of 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'}

Each point in the input array can be either an array like [50.5, 30.5, 0.5],
or a Leaflet LatLng object.

Optional third argument in each LatLng point (altitude) represents point intensity.
Unless max option is specified, intensity should range between 0.0 and 1.0.


#### Methods

- 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.

Changelog

$3

- Fixed intensity to work properly with max option.
- Fixed zoom animation on Leaflet 1.0 beta 2.
- Fixed tiles and point intensity in demos.

#### 0.1.3 — Nov 25, 2015

- Fixed some edge cases when handling point intensity.
- Added minOpacity option.

#### 0.1.2 — Nov 5, 2014

- Added compatibility with Leaflet 0.8-dev.

#### 0.1.1 — Apr 22, 2014

- Fixed overlaying two heatmaps on top of each other.
- Fixed rare animation issues.

#### 0.1.0 — Feb 3, 2014

- 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.

#### 0.0.1 — Jan 31, 2014

- Initial release.