Processing 1960's Spy Satellite Photographs to Evaluate Vegetation Changes

Dr. H. David Snyder currently does research at NASA in the Biospheric Sciences Laboratory on processing spy satellite photographs from the 1960’s Corona Program for use in evaluating vegetation changes.  The work involves projecting pixels from panoramic photographs from the spacecraft down to the Earth’s surface and mapping these pixels correctly to the existing terrain. This following preliminary image was taken in 1967, from over a region near Mexico City.