Hi, first first of all thanks for this wonderfull peace of code. I got one question is it possible or how can i implement this kind of behavior... i have on my mapview a number of different kind of annotations for example busstations, train stations or airports. how can i group them together in one icon per group when i zoom out ? in this example i would have than 3 icons (bus,train,airport) instead of just one. Thanks for your help.