Lots of markers on Google Maps (svennerberg.com)

Good stuff. I've used maptimize.com in the past for dealing with ad hoc geographical visualizations.

I used one of the approaches, Marker Clusterer, recently for a quickie map of 500+ orgs: http://appealforcommunities.org/networkmap

The InfoWindows were particularly tricky. I wish we could have had the time to do custom marker logos, but the nuclear-like ones work well.

Nice article. Another good resource I found is this Google I/0 2009 video on performance tips with google maps: http://www.youtube.com/watch?v=zI8at1EmJjA

It should be noted that this is for v2 of the API (which has been deprecated). For a more recent post about lots of markers on a v3 map, you might want to check out Redfin’s post on their solution, MultiMarker: http://blog.redfin.com/devblog/2010/07/introducing_multimark...

Why does this get up voted? It's a 2 years old tutorial on a deprecated Google Maps module that most HNers will never use. Am I missing something?

I used ClusterMarker for a storm reporting site I built when the mashups craze first started. It handled the hundreds or so markers I needed it for wonderfully well,

Which made me just realize that v2 of the Google Maps is deprecated and it's time to upgrade to v3.