Facebook is about to jump into unfriendly waters. There are risks to going public. The trick for Facebook will be to balance the concerns of its shareholders with the need to push the boundaries of innovation. This is no easy task.
Dencity maps population density using circles of various size and hue. Larger, darker circles show areas with fewer people, while smaller, brighter circles highlight crowded cities. Representing denser areas with smaller circles results in additional geographic detail where there are more people, while sparsely populated areas are more vaguely defined.