Automatically adjust zoom to accommodate all marker in a google map

Question

Using the latest version of Google maps. How to add markers using longitude and latitude and automatically adjust the zoom level of the map to include all the markers using JavaScript?

Answer 1

Google Maps API v3 provides a LatLngBounds object to which you can add multiple LatLng objects. You can then pass this to Map.fitBounds() function as described here:

• Zoom-To-Fit All Markers, Polylines or Polygons on A Google Map - API v2
• Zoom-to-Fit All Markers on Google Map v3

Partial Example

var latlng = [
    new google.maps.LatLng(1.23, 4.56),
    new google.maps.LatLng(7.89, 1.01),
    // ...
]; 
var latlngbounds = new google.maps.LatLngBounds();
for (var i = 0; i < latlng.length; i++) {
    latlngbounds.extend(latlng[i]);
}
map.fitBounds(latlngbounds);