updated code for the heat map

Leaflet.heat-gh-pages/LICENSE

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+Copyright (c) 2014, Vladimir Agafonkin
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without modification, are
+permitted provided that the following conditions are met:
+
+   1. Redistributions of source code must retain the above copyright notice, this list of
+      conditions and the following disclaimer.
+
+   2. Redistributions in binary form must reproduce the above copyright notice, this list
+      of conditions and the following disclaimer in the documentation and/or other materials
+      provided with the distribution.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY
+EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
+TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

Leaflet.heat-gh-pages/README.md

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+Leaflet.heat
+==========
+
+A tiny, simple and fast [Leaflet](http://leafletjs.com) heatmap plugin.
+Uses [simpleheat](https://github.com/mourner/simpleheat) under the hood,
+additionally clustering points into a grid for performance.
+
+
+## Demos
+
+- [10,000 points →](http://leaflet.github.io/Leaflet.heat/demo)
+- [Adding points dynamically →](http://leaflet.github.io/Leaflet.heat/demo/draw.html)
+
+
+## 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
+<script src="leaflet-heat.js"></script>
+```
+
+## 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'}`
+- **pane** - Map pane where the heat will be drawn. Defaults to 'overlayPane'.
+
+Each point in the input array can be either an array like `[50.5, 30.5, 0.5]`,
+or a [Leaflet LatLng object](http://leafletjs.com/reference.html#latlng).
+
+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
+
+### 0.2.0 &mdash; Oct 26, 2015
+
+- 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 &mdash; Nov 25, 2015
+
+- Fixed some edge cases when handling point intensity.
+- Added `minOpacity` option.
+
+#### 0.1.2 &mdash; Nov 5, 2014
+
+- Added compatibility with Leaflet 0.8-dev.
+
+#### 0.1.1 &mdash; Apr 22, 2014
+
+- Fixed overlaying two heatmaps on top of each other.
+- Fixed rare animation issues.
+
+#### 0.1.0 &mdash; 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 &mdash; Jan 31, 2014
+
+- Initial release.
+

Leaflet.heat-gh-pages/demo/draw.html

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+<!DOCTYPE html>
+<html>
+<head>
+    <title>Leaflet.heat demo</title>
+    <link rel="stylesheet" href="https://unpkg.com/[email protected]/dist/leaflet.css"
+    integrity="sha256-kLaT2GOSpHechhsozzB+flnD+zUyjE2LlfWPgU04xyI=" crossorigin="" />
+   <script src="https://unpkg.com/[email protected]/dist/leaflet.js"
+    integrity="sha256-WBkoXOwTeyKclOHuWtc+i2uENFpDZ9YPdf5Hf+D7ewM=" crossorigin=""></script>
+    <style>
+        #map { width: 800px; height: 600px; }
+        body { font: 16px/1.4 "Helvetica Neue", Arial, sans-serif; }
+        .ghbtns { position: relative; top: 4px; margin-left: 5px; }
+        a { color: #0077ff; }
+    </style>
+</head>
+<body>
+
+<p>
+    A dynamic demo of <a href="https://github.com/Leaflet/Leaflet.heat">Leaflet.heat</a>, a tiny and fast Leaflet heatmap plugin.
+    <iframe class="ghbtns" src="https://ghbtns.com/github-btn.html?user=Leaflet&amp;repo=Leaflet.heat&amp;type=watch&amp;count=true"
+  allowtransparency="true" frameborder="0" scrolling="0" width="90" height="20"></iframe>
+</p>
+
+<div id="map"></div>
+
+<!-- <script src="../node_modules/simpleheat/simpleheat.js"></script>
+<script src="../src/HeatLayer.js"></script>
+ -->
+<script src="../dist/leaflet-heat.js"></script>
+
+<script src="https://leaflet.github.io/Leaflet.markercluster/example/realworld.388.js"></script>
+<script>
+
+var map = L.map('map').setView([-37.82109, 175.2193], 16);
+
+var tiles = L.tileLayer('https://tile.openstreetmap.org/{z}/{x}/{y}.png', {
+    attribution: '&copy; <a href="https://osm.org/copyright">OpenStreetMap</a> contributors',
+}).addTo(map);
+
+addressPoints = addressPoints.map(function (p) { return [p[0], p[1]]; });
+
+var heat = L.heatLayer(addressPoints).addTo(map),
+    draw = true;
+
+map.on({
+    movestart: function () { draw = false; },
+    moveend:   function () { draw = true; },
+    mousemove: function (e) {
+        if (draw) {
+            heat.addLatLng(e.latlng);
+        }
+    }
+})
+
+</script>
+</body>
+</html>

Leaflet.heat-gh-pages/demo/index.html

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+<!DOCTYPE html>
+<html>
+<head>
+    <title>Leaflet.heat demo</title>
+   <link rel="stylesheet" href="https://unpkg.com/[email protected]/dist/leaflet.css"
+    integrity="sha256-kLaT2GOSpHechhsozzB+flnD+zUyjE2LlfWPgU04xyI=" crossorigin="" />
+    <script src="https://unpkg.com/[email protected]/dist/leaflet.js"
+    integrity="sha256-WBkoXOwTeyKclOHuWtc+i2uENFpDZ9YPdf5Hf+D7ewM=" crossorigin=""></script>
+    <style>
+        #map { width: 800px; height: 600px; }
+        body { font: 16px/1.4 "Helvetica Neue", Arial, sans-serif; }
+        .ghbtns { position: relative; top: 4px; margin-left: 5px; }
+        a { color: #0077ff; }
+    </style>
+</head>
+<body>
+
+<p>
+    A 10,000-point demo of <a href="https://github.com/Leaflet/Leaflet.heat">Leaflet.heat</a>, a tiny and fast Leaflet heatmap plugin.
+    <iframe class="ghbtns" src="http://ghbtns.com/github-btn.html?user=Leaflet&amp;repo=Leaflet.heat&amp;type=watch&amp;count=true"
+  allowtransparency="true" frameborder="0" scrolling="0" width="90" height="20"></iframe>
+</p>
+
+<div id="map"></div>
+
+<!-- <script src="../node_modules/simpleheat/simpleheat.js"></script>
+<script src="../src/HeatLayer.js"></script> -->
+
+<script src="../dist/leaflet-heat.js"></script>
+
+<script src="http://leaflet.github.io/Leaflet.markercluster/example/realworld.10000.js"></script>
+<script>
+
+var map = L.map('map').setView([-37.87, 175.475], 12);
+
+var tiles = L.tileLayer('https://tile.openstreetmap.org/{z}/{x}/{y}.png', {
+    attribution: '&copy; <a href="http://osm.org/copyright">OpenStreetMap</a> contributors',
+}).addTo(map);
+
+addressPoints = addressPoints.map(function (p) { return [p[0], p[1]]; });
+
+var heat = L.heatLayer(addressPoints).addTo(map);
+
+</script>
+</body>
+</html>

Leaflet.heat-gh-pages/package.json

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+{
+  "name": "leaflet.heat",
+  "version": "0.2.0",
+  "description": "A tiny and fast Leaflet heatmap plugin.",
+  "homepage": "https://github.com/Leaflet/Leaflet.heat",
+  "keywords": [
+    "heatmap",
+    "canvas",
+    "visualization",
+    "gis",
+    "leaflet",
+    "plugin"
+  ],
+  "author": "Vladimir Agafonkin",
+  "repository": {
+    "type": "git",
+    "url": "git://github.com/Leaflet/Leaflet.heat.git"
+  },
+  "main": "dist/leaflet-heat.js",
+  "devDependencies": {
+    "eslint": "^1.7.3",
+    "eslint-config-mourner": "^1.0.1",
+    "simpleheat": "~0.2.0",
+    "uglify-js": "^2.5.0"
+  },
+  "eslintConfig": {
+    "extends": "mourner",
+    "globals": {
+      "L": false,
+      "simpleheat": false
+    }
+  },
+  "scripts": {
+    "test": "eslint src",
+    "prepublish": "uglifyjs node_modules/simpleheat/simpleheat.js src/HeatLayer.js -c -m -o dist/leaflet-heat.js"
+  },
+  "license": "BSD-2-Clause",
+  "jshintConfig": {
+    "quotmark": "single",
+    "globals": {
+      "L": true,
+      "simpleheat": true
+    },
+    "trailing": true,
+    "camelcase": true,
+    "curly": true,
+    "eqeqeq": true,
+    "noempty": true,
+    "nonbsp": true,
+    "undef": true,
+    "unused": true,
+    "browser": true
+  }
+}