Ferdinand Hassler directing movement of the Great Theodolite on Fire Island.
Angle measurements at the end points of the Fire Island Base Line.
Probably sketched by Assistant John Farley
Image ID: theb1851, NOAA's Historic Coast & Geodetic Survey (C&GS) Collection
Location: Fire Island, New York
Photo Date: 1836
Credit: NOAA Photo Library, NOAA Central Library; NOAA Central Library
Category: Getting There/On Foot/
• High Resolution Photo Available