Andrew Walker visualized the mass-transit systems of most major cities using a custom-built software program created in his spare time. The videos are created with GTFS (General Transit Feed Specification) data. GTFS is a file format for mass transit schedules that Google maps uses to calculate how to get from point A to point B when you click on the public transit option. Walker hopes to keep making more of the mesmerizing videos and we hope he does too.
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