The tool gives you two options: The draw mode matches strokes of your finger with satellite images that match every squiggle, while the drag mode enables users to create an infinite line of connected rivers, highways and coastlines.
By “using a combination of machine learning, optimized algorithms and graphics card power, the experiment is able to run efficiently on your phone’s Web browser without a need for backend servers,” according to the website.
The tool appears to work seamlessly on Google Chrome, and Mozilla Firefox and Edge browsers, but appears not to work in Internet Explorer.