Interesting story on a survey and accurate map of the SE New England coast in 1844. It mentions that the U. S. Coast Survey used meters back then, and describes laying out a baseline, and then building a triangulation grid. Sadly, the author after explaining it was all measured in meters, describes the accuracy as about 1 inch in 10 miles (a little better than 2mm/km). http://www.wickedlocal.com/mansfield/topstories/x1837096279/THIS-OLD-TOWN-A-map-of-our-coast-began-here?zc_p=0
