<html>
<head>
<script src="https://api.mqcdn.com/sdk/mapquest-js/v1.3.2/mapquest.js"></script>
<link type="text/css" rel="stylesheet" href="https://api.mqcdn.com/sdk/mapquest-js/v1.3.2/mapquest.css"/>
<script src="https://leaflet.github.io/Leaflet.heat/dist/leaflet-heat.js"></script>
<script src="https://leaflet.github.io/Leaflet.markercluster/example/realworld.10000.js"></script>
<script type="text/javascript">
window.onload = function() {
L.mapquest.key = '8nIoYUx9GyjZsdehJySzjprSvZIqgM42';
var baseLayer = L.mapquest.tileLayer('map');
var map = L.mapquest.map('map', {
center: [-37.87, 175.475],
layers: baseLayer,
zoom: 12
});
addressPoints = addressPoints.map(function (addressPoint) { return [addressPoint[0], addressPoint[1]]; });
L.heatLayer(addressPoints).addTo(map);
}
</script>
</head>
<body style="border: 0; margin: 0;">
<div id="map" style="width: 100%; height: 530px;"></div>
</body>
</html>