A rare peek on how Google build maps

An exclusive look inside Ground Truth, the secretive program to build the world's best accurate maps by Alexis C. Madrigal, enior editor at The Atlantic.

http://www.theatlantic.com/technology/archive/2012/09/how-google-builds-its-maps-and-what-it-means-for-the-future-of-everything/261913/

(Thank you Maning Sambale for sharing)