I recently needed to generate a Google Map with multiple markers and popup info windows. Easy, right? The twist was that I also wanted the marker pins to be different colors and I needed the map to auto center.
Here’s the script I pulled together to make it happen:
Google Maps Multiple Markers –

<script src=""></script>
<div id="map" style="width: 500px; height: 400px;"></div>
// Define your locations: HTML content for the info window, latitude, longitude
var locations = [
['<h4>Bondi Beach</h4>', -33.890542, 151.274856],
['<h4>Coogee Beach</h4>', -33.923036, 151.259052],
['<h4>Cronulla Beach</h4>', -34.028249, 151.157507],
['<h4>Manly Beach</h4>', -33.80010128657071, 151.28747820854187],
['<h4>Maroubra Beach</h4>', -33.950198, 151.259302]];

// Setup the different icons and shadows
var iconURLPrefix = '';

var icons = [
iconURLPrefix + 'red-dot.png',
iconURLPrefix + 'green-dot.png',
iconURLPrefix + 'blue-dot.png',
iconURLPrefix + 'orange-dot.png',
iconURLPrefix + 'purple-dot.png',
iconURLPrefix + 'pink-dot.png',
iconURLPrefix + 'yellow-dot.png'
var iconsLength = icons.length;

var map = new google.maps.Map(document.getElementById('map'), {
zoom: 10,
center: new google.maps.LatLng(-37.92, 151.25),
mapTypeId: google.maps.MapTypeId.ROADMAP,
mapTypeControl: false,
streetViewControl: false,
panControl: false,
zoomControlOptions: {
position: google.maps.ControlPosition.LEFT_BOTTOM

var infowindow = new google.maps.InfoWindow({
maxWidth: 160

var markers = new Array();

var iconCounter = 0;

// Add the markers and infowindows to the map
for (var i = 0; i < locations.length; i++) {
var marker = new google.maps.Marker({ position: new google.maps.LatLng(locations[i][1], locations[i][2]), map: map, icon: icons[iconCounter] }); markers.push(marker); google.maps.event.addListener(marker, 'click', (function(marker, i) { return function() { infowindow.setContent(locations[i][0]);, marker); } })(marker, i)); iconCounter++; // We only have a limited number of possible icon colors, so we may have to restart the counter if(iconCounter >= iconsLength) {
iconCounter = 0;

function autoCenter() {
//  Create a new viewpoint bound
var bounds = new google.maps.LatLngBounds();
//  Go through each...
for (var i = 0; i < markers.length; i++) { bounds.extend(markers[i].position); } // Fit these bounds to the map map.fitBounds(bounds); } autoCenter();

One thought on “Generating a Google Map with multiple markers and info windows

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