title: Is there a way to cluster google map markers by country?
body: <p>I'm currently using <a href="http://google-maps-utility-library-v3.googlecode.com/svn/tags/markerclustererplus/" rel="noreferrer">MarkerClustererPlus</a> to cluster my markers. (Any other suggestions welcome) And I was wondering if there is a way to cluster by say, continents or countries, instead of by proximity. Thanks</p>