I have a mapview that has a lot of annotations, most of them are very close to each other. What I want to do is similar to the Photo app on iOS where annotations are grouped when they are too close to each other and whenever you zoom out, they un grouped if they are too far apart.

I have seen this question already but the answer given isn't really what I was looking for.

I'm looking for either a library or a algorithm that I could implement myself.

ios mapkit mkannotation
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