title: Google Maps API - Markers with duplicate latitude and longitude
body: <p>I have a map that shows up to 30 markers, all loaded from the store database table upon user query.
  the table has couple of thousand stored in it.</p>
  
  <p><strong>Problem:</strong></p>
  
  <p>Some latitude and  longitude in database are duplicate, which are needed.  when these are plotted on the map they overlapping each other. Resulting the user cant see all the markers,  these need to be clicked by the user to show more info and etc.</p>
  
  <p><strong>Question:</strong>
  Is is possible to show on the map, those hidden markers?</p>
  
  <p>Thanks.</p>