Google Maps V3: Only show markers in viewport - Clear markers issue

Question

I like to create a map with Google Maps that can handle large amounts of markers (over 10.000). To not slow down the map I\'ve created a XML-file that only outputs the markers t

Answer 1

You might want to check out this documentation from Google. It explains what you need:

With the new list of markers you can remove the current markers 
(marker.setMap(null)) that are on the map and 
add the new ones (marker.setMap(map)).