google map heatmap

by rexonms

HTML

<!DOCTYPE html>
<html>
  <head>
    <meta charset="utf-8">
    <title>Heatmaps</title>
    <style>
      html, body, #map-canvas {
        height: 100%;
        margin: 0px;
        padding: 0px
      }
      #panel {
        position: absolute;
        top: 5px;
        left: 50%;
        margin-left: -180px;
        z-index: 5;
        background-color: #fff;
        padding: 5px;
        border: 1px solid #999;
      }
    </style>
    <script src="https://maps.googleapis.com/maps/api/js?v=3.exp&libraries=visualization"></script>
    <script>
// Adding 500 Data Points
var map, pointarray, heatmap;

var taxiData = [
  new google.maps.LatLng(37.782551, -122.445368),
  new google.maps.LatLng(37.782745, -122.444586),
  new google.maps.LatLng(37.782842, -122.443688),
  new google.maps.LatLng(37.782919, -122.442815),
  new google.maps.LatLng(37.782992, -122.442112),
  new google.maps.LatLng(37.783100, -122.441461),
  new google.maps.LatLng(37.783206, -122.440829),
  new google.maps.LatLng(37.783273, -122.440324),
  new google.maps.LatLng(37.783316, -122.440023),
  new google.maps.LatLng(37.783357, -122.439794),
  new google.maps.LatLng(37.783371, -122.439687),
  new google.maps.LatLng(37.783368, -122.439666),
  new google.maps.LatLng(37.783383, -122.439594),
  new google.maps.LatLng(37.783508, -122.439525),
  new google.maps.LatLng(37.783842, -122.439591),
  new google.maps.LatLng(37.784147, -122.439668),
  new google.maps.LatLng(37.784206, -122.439686),
  new google.maps.LatLng(37.784386, -122.439790),
  new google.maps.LatLng(37.784701, -122.439902),
  new google.maps.LatLng(37.784965, -122.439938),
  new google.maps.LatLng(37.785010, -122.439947),
  new google.maps.LatLng(37.785360, -122.439952),
  new google.maps.LatLng(37.785715, -122.440030),
  new google.maps.LatLng(37.786117, -122.440119),
  new google.maps.LatLng(37.786564, -122.440209),
  new google.maps.LatLng(37.786905, -122.440270),
  new google.maps.LatLng(37.786956, -122.440279),
  new...