Question

How can I add a listener to google maps so that When it already has marker at say position x,y then another marker when added to the map to the same location will displace both the new and old markers in the vicinity of x,y so that they dont overlap.

also for e.g. there are 2 markers close but not overlapping, we add a third marker overlapping on of them, then we displace all three to form an equilateral triangle.

Answer 1

I ran into this issue also, Diodeus is correct that if you want to actually move one of the markers locations you would have to keep a store of your markers and as you are getting ready to plot check if that specific lat lng has already been plotted, if so at that point you would adjust the lat lng. The problem I ran into was that then one of your markers is in an incorrect location and/or it is still not viewable depending on the degree of zoom in correlation to the displacement that you add to your lat/lng.

I would recommend looking into marker clustering personally. This seems to be the route to go in these situations if you don’t want to have a marker on your map with the incorrect location and still want the end user to be able to know that their are multiple markers on the same location.

Hope this helps.