As the light sticks were being carried down the beach, A select group of walkers had a mobile app recording their location every second. The visualisation on the right was created by transforming that raw GPS data into svg paths which were then rendered in 3D.
To create your own remix, in whatever format you choose, you can download the data from Github. The download includes this demo that allows you to view the data in a visual format (enable debug mode at the bottom).
The visualisation above was created by transforming the raw data into svg paths.