Google heat map functionality

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Callum Jones

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Mar 31, 2020, 6:43:23 PM3/31/20
to Google Visualization API
Hi. I have this code and it works when just plotting
markers on the map but can't seem to get the heatmap
working. Any tips?



<!DOCTYPE html >
<head>
<meta name="viewport" content="initial-scale=1.0, user-scalable=no" />
<meta http-equiv="content-type" content="text/html; charset=UTF-8"/>
<title>Using MySQL and PHP with Google Maps</title>
<style>
/* Always set the map height explicitly to define the size of the div
* element that contains the map. */
#map {
height: 100%;
}
/* Optional: Makes the sample page fill the window. */
html, body {
height: 100%;
margin: 0;
padding: 0;
}
</style>
</head>

<html>
<body>
<div id="map"></div>

<script>
var customLabel = {
restaurant: {
label: 'R'
},
bar: {
label: 'B'
}
};

function initMap() {
var map = new google.maps.Map(document.getElementById('map'), {
center: new google.maps.LatLng(51.419153, 0.059713),
zoom: 6
});
var infoWindow = new google.maps.InfoWindow;

// Change this depending on the name of your PHP or XML file
downloadUrl('XMLfileLatLong.php', function(data) {
var xml = data.responseXML;
var markers = xml.documentElement.getElementsByTagName('marker');
var points= [];

Array.prototype.forEach.call(markers, function(markerElem) {
var id = markerElem.getAttribute('id');
var name = markerElem.getAttribute('name');
var address = markerElem.getAttribute('address');
var type = markerElem.getAttribute('type');
var point = new google.maps.LatLng(
parseFloat(markerElem.getAttribute('Latitude')),
parseFloat(markerElem.getAttribute('Longitude')));

points.push(point);
});

var heatmap = new google.maps.visualization.HeatmapLayer({
data: points,
map: map,
});
});
}
</script>
<script async defer
</script>
</body>
</html>
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