Alex Alex - 1 year ago 105
Javascript Question

How to set the Google Map zoom level to show all the markers?

How do I set the zoom level to show all the markers on Google Maps?

In my Google Map there are different markers in different positions. I want to set google map zoom level based on the range of markers (that means in the view of google map, i want to see all markers)

Answer Source

There you go:

<!DOCTYPE html>
   <meta http-equiv="content-type" content="text/html; charset=UTF-8"/> 
   <title>Google Maps getBoundsZoomLevel Demo</title> 
   <script src=";v=2&amp;sensor=false" 
<body onunload="GUnload()"> 

   <div id="map" style="width: 400px; height: 300px"></div> 

   <script type="text/javascript"> 

   if (GBrowserIsCompatible()) {
      var map = new GMap2(document.getElementById("map"));
      var markerBounds = new GLatLngBounds();

      for (var i = 0; i < 10; i++) {
         var randomPoint = new GLatLng( 39.00 + (Math.random() - 0.5) * 20, 
                                       -77.00 + (Math.random() - 0.5) * 20);

         map.addOverlay(new GMarker(randomPoint));


We are creating 10 random points in the above example and then passing each point to GLatLngBounds.extend(). Finally we get the correct zoom level with GMap2.getBoundsZoomLevel().

Google Maps getBoundsZoomLevel Demo