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Some people who work at data-rich companies have the privilege to access some quite revealing datasets. For instance, a few months ago, Matthew Whealy, who works at FourSquare, revealed how and when people reported their physical location to the location-based social networking website.

A Week of Checkins [matthewhealy.net] simply animates time-lapsed check-ins across a global map, which are color-coded according to the venue categories.

Watch the 1 minute of meaningfully flickering dots in the movie below.

See also A Week on FourSquare (by the Wall Street Journal) and archipelago (by Anil Bawa-Cavia) for some other beautiful Foursquare-based visualizations.