Congrats, in my humble opinion this looks like a game changing idea. I don't see any reason why this can't become a legitimate news source or the visual versi

Congrats, in my humble opinion this looks like a game changing idea. I don't see any reason why this can't become a legitimate news source or the visual version of reddit where upvotes come from density ratings. I'm pretty sure you've thought of this but if not here is some algorithm advice: you should start recording baseline density referenced by time (maybe use Fourier to detect time patterns?) so you can start filtering out the noise. That way you can filter out the few thousand pictures of the Empire State Building everyday unless something happens at the ESB in which case density would dramatically increase relative to time. Also, this would be great to see visually on a map where when you zoom farther and farther in the clusters get redrawn so I can see micro events happening within the major event. Great job!