How would one go about implementing the same type of marker grouping as found on this website? http://clevertrail.com/
Is this something that is delivered by the google maps api? If not, how can one create these kinds of groupings?
Any suggested solutions is greatly appreciated!
You can use marker cluster for that: http://code.google.com/p/google-maps-utility-library-v3/wiki/Libraries. It does the grouping in JS but it’s not very efficient.