We all know how tagging makes the Web a richer place (by tapping into people’s desire to categorize things and share those categories, ad-hoc though they may be, with the everyone else). Tagging brings a bottoms-up order to the Web by making information more searchable and thus easier to find. Now it is time to start tagging the world. The real world.
In fact, millions of people are already doing so every time they upload a geo-coded photo to Flickr, add a review to Yelp, Tweet about a specific place, or use any of the dozens of geo-aware social apps springing up all over the place. They are not just tagging the world with keywords, they are commenting on it and annotating it in tiny little bursts. To get a sense of what some of this activity looks like, check out Twittervision or Flickrvision, which show Tweets and Flickr photos, respectively, on a map as they are posted to the Web.
Services such as Plazes (now owned by Nokia), Brightkite, and Nokia’s new Friend View app all combine social communications and location information, making them visible on