Eric Fischer used the Twitter API to map every geotagged tweet from the last three and a half years.
The results are fascinating. You can see the popularity of tagging one location over another - Try zooming in on the o2 Arena or Wembley Stadium, or seeing the surprisingly large number of tweets being geotagged on the M25.
I’ve been tracking geotagged tweets from Twitter’s public API for the last three and a half years. There are about 10 million public geotagged tweets every day, which is about 120 per second, up from about 3 million a day when I first started watching. The accumulated history adds up to nearly three terabytes of compressed JSON and is growing by four gigabytes a day. And here is what those 6,341,973,478 tweets look like on a map, at any scale you want.