objective c - ios sdk MKMapView overlapping pins? -

i have map view , many pins on it.
when map view zoomed out, group overlapping pins 1 (and show in label total count of pins in it).
do, if map view max zoomed in, , pins still overlapped?

how can shift them while not overlap each other ?
this:

or there solution?

in different solution same problem, demo in wwdc 2011 #111 - visualizing information geographically mapkit video (the demo little more 18 min video) illustrates example of how can prevent overlapping annotations (including nice animation revealing , hiding more detailed annotations zoom in , out).

what break mapview grid of particular size (i think use 60px), , if close, pick 1 grid , hide others. graceful hiding of annotations zoom out (so can see annotations being hidden fly visible annotation group). zoom in annotations unhidden, see fly out of 1 central annotation grid.