Stage 17 of this year's Tour de France includes the popular Col d'Allos mountain stage. The Col'Allos is one of the most popular mountain passes in the Tour de France. This year will be the 34th time the route has been included in the race.
The Wall Street Journal has taken a detailed look at the big descents in this year's Tour de France. The Madness of the Descent looks in particular at the Col d'Allos. During Stage 17, after a steep climb, with an average gradient of 5.5%, the riders will face a 10 mile descent, where they will lose 3,400 feet in vertical elevation.
The Wall Street Journal's article includes an impressive 3d map of the Cal d'Allos pass. The 3d Col D’Allos visualization was created with WebGL and three.js. If you select one of the three yellow map markers the graphic pans and rotates to highlight different views of the Col D'Allos descent.
Via: Visualoop
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