Recently, the fitness app Strava published a “heatmap” of trillion of data points visualizing the information of users who submitted or synchronized their fitness activity to their servers. This data includes both fitness information recorded directly on the fitness app and data synchronized with the app from a number of physical fitness trackers, such as a Fitbit.
The purpose of this heatmap was to show the most active areas for Strava users, including paths for jogging or cycling. However, the heatmap also visualized the data of individual users. In other words, the path of millions of jogs in Central Park in …read more