In January 2015, the Space Needle in Seattle had a 360 webcam installed. Over the past three years, the camera has been taking a 360 panorama of the city every ten minutes. Google engineer Ricardo Martin Brualla decided to turn the three-years worth of images into a timelapse of the city. As a result, you can see the seasons changing and the city growing before your eyes, in under four minutes. It’s captivating to watch, and Brualla shares some details about how he did it.

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