How Can I Cluster Markers Without Overlap With Google Maps?

I am currently clustering hundreds of markers on my google maps. Many of the markers are based on geo-coded addresses, which at times only resolve to the city level. Normally i wil

Solution 1:

Look at the OverlappingMarkerSpiderfier

See this post on integrating it with MarkerClusterer

Solution 2:

I had a similar (albeit not exactly the same) problem.

I needed to draw sample points in a plot chart. But I found collisions (exact overlap for some points coming from coarser lectures) and aliasing artifacts (partial overlaps with repeating some fixed amount of displacement due also to coarser lectures).

I decided to introduce some random displacements to all of the points. The "noise" had a normal distribution with a variance two times smaller than the variance of the measured error of the sample, so it did not change add significant variance to the perceived sample. The result was a much clearer chart, more informative, and nicer.

Applying this experience in your case, I would detect exact overlaps in Lat Long and for those I would add some random Lat and Long, effectively moving the point a bit away of its original position and thus avoiding the exact overlap.