Structure from Motion orthomosaic of Vicksburg National Military Park in Vicksburg, MS created from 1938 aerial imagery

The dataset is a 0.5 m spatial resolution panchromatic (black and white - B&W) orthomosaic of northern Vicksburg, MS and Vicksburg National Military Park in 1938.The orthomosaic was created from aerial images acquired on June 14, 1938 by Pan American Aerial Surveys for the U.S. Department of Agriculture at approximately 1:20,000 scale by a Fairchild K-10 or similar aerial camera with 5in x 7in frame. The images, archived together with other unrelated aerial imaging projects on film rolls, were accessed at the National Archive in College Park, MD and scanned to digital using an Epson scanner at 2400 dots per inch with 16-bit radiometric resolution. In total 14 frames were scanned, ranging from AVM-3-13 to AVM-3-23A and AVM-2-129 to AVM-2-132. Of these 14 frames, only 4 (AVM-3-19 - AVM-3-122) were found to be useable for SfM-aided DEM generation. Ground reference was established through 83 ground control points, with horizontal coordinates acquired from 6 inch high resolution orthoimagery of Warren County, Mississippi, and vertical elevations acquired from a 1m DEM created from 2020 lidar.