Interestingly, that was my first thought too. I'm the guy who hacked together the javascript which passably reads the database file in-browser for this, and two

Interestingly, that was my first thought too. I'm the guy who hacked together the javascript which passably reads the database file in-browser for this, and two things stood out to me as I was working: How much data there was, and how not-quite-that-accurate it was. I think the initial app's way of presenting the data has merit because it does hide the swarm of identical points, but it also does make it 'feel' more accurate when you look at it because 'Yes! I live in that circle.' There's sure to be a happy middle ground somewhere.