C&GS; Ship HYDROGRAPHER as seen from photogrammetric aircraft.First photo mission for C&GS; was an attempt to determined depths in clear water. Project in Florida Keys - ship was used as fixed reference program.Cooperative project with Aeroplane Serv
3/18/2019 12:22:35 PM
Date: 1919
Credit: NOAA Central Library
Location: Florida Keys, Satan Shoal
Subject: Geodesy
Subject: Topography
Subject: Photogrammetry