There's a book on my desk called Up and Down California in 1860-1864. It's about the first land surveys of the West Coast of America, through a (long) series of weekly letters from one of the expedition's crew to his brother in New York. This was back in the heyday of pioneering, romanticized by many, especially now when it seems we've charted every square inch of the planet.
One team at the Haiti Rebuilding Center is proving this not to be the case. And their methods of cartography would look strange indeed to the surveyors of yesteryear. #opensource