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20250625 09514000 20250625 09514000 Microsoft Windows Server 2016 Technical Preview Version 10.0 (Build 17763) ; Esri ArcGIS 13.4.0.55405 Ortho_1927 1 -77.139828 -76.900900 39.045873 38.781182 This dataset contains georeferenced aerial imagery from 1927 and 1930 covering the District of Columbia. The original photographs were created as part of early aerial survey efforts and are held within a combined National Archives and Records Administration (NARA) catalog entry (NARA ID 139056920), Record Group 328. The images were scanned by the National Capital Park and Planning Commission, Federal Projects Planning Division (ca. 1926–ca. 1952). A multi-agency collaboration—including the Historic Preservation Office, OCTO, DHS, OP, DOEE, DOH, and FEMS—completed the georeferencing and mosaic development. As part of this effort, the team georeferenced and cataloged the full 1927 aerial photo series of the District, derived from more than 700 high‑resolution image scans. The resulting mosaic and index provide a historic baseline for land use, urban development, environmental analysis, and cultural resource research. ortho 1927 aerial dc Aerial Photography Image of Washington, DC from 1927 and 1930. Office of the Chief Technology Officer, Historic Preservation, DHS, OP, DOEE, DOH, and FEMS None. However, users should be aware that temporal changes may have occurred since this dataset was collected and that some parts of these data may no longer represent actual surface conditions. Users should not use these data for critical applications without a full awareness of its limitations. This work is licensed under a Creative Commons Attribution 4.0 International License. File Geodatabase Raster Dataset dataset EPSG 4.5(3.0.1) Pixel 35059 25330 0.816550 0.837834 8 1 Upper Left FALSE LZ77 3 pixel codes FGDBR TRUE row and column 0.816550 0.837834 20250625