Corbin Apkin, Archivist and NARA’s designated Aerial Film Subject Matter Expert, outlines the process of searching satellite photography for images of interest to you in his newest blog post, “Researching Satellite Photography” on the History Hub.
maps
Over 100 Confederate Maps Now Online
NARA’s Cartographic Records Branch has digitized over 100 maps from RG 109, War Department Collection of Confederate Records. Read about it here: RG 109 Confederate Maps Series Now Digitized and Available Online!