title: How to use R-Tree for plotting large number of map markers on google maps
body: <p>After searching SO and multiple articles I haven't found a solution to my problem. </p>
  
  <p>What I am trying to achieve is to load 20,000 markers on Google Maps. </p>
  
  <p><a href="http://trac.gispython.org/lab/wiki/Rtree" rel="nofollow noreferrer">R-Tree</a> seems like a good approach but it's only helpful when searching for points within the visible part of the map. When the map is zoomed out it will return all of the points and...crash the browser.</p>
  
  <p>There is also the problem with dragging the map and at the end of dragging re-running the query.</p>
  
  <p>I would like to know how I can use R-Tree and be able to achieve the all of the above.</p>