Do you remember GPS art by Michael Wallace? He biked around the city and recorded his GPS tracks in different shapes. Really cool project.
A new mobile app called The Trace developed at the University of Washington does the opposite. The app takes a digital sketch which you draw on your smartphone into a walking route. The route creates “a secret message” which you can send to a friend or loved one. The recipient has to download the app, open the message and choose how long they want to walk. The app computes a route based on your location and Google Maps street network and prepares a step-by-step directions. When a user walk along the route he will reveal the hidden shape on a map.
Additionally sender can do a couple of additional things to make the walk more attractive. He/she can include audio recordings, images or inside messages that pop up at specified locations along the route to give the recipient hints. It’s a little bit like a scavenger hunt but at the end what you get is a message in a form of a shape. The app is available for both iOS and Android.



