<p>Foursquare designer Matt Healey has explained in an interview with Fast Company how he created the stunning Pulse visualizations of check-in data that the company has been showing off recently.</p><p>Healey said he used the Processing programming language to manipulate the data, which would sometimes be as large as a 5GB text file. The work wasn't all for show, either, as it contributed to the creation of the "Places people go next" feature.</p><p>How Foursquare Made Those Insane Data Visualizations [Fast Co.Labs]</p><p><a href="http://thenextweb.com/insider/2013/10/07/foursquare-designer-explains-how-he-created-mesmerizing-visualizations-from-check-in-data/">Keep reading...</a></p>