1931 Imagery (Tacoma)

This dataset is a tile mosaic of 3-foot aerials of the City of Tacoma from 1973. Contact Info: GIS Team GISteam@cityoftacoma.org Company: Fairchild Aerial Surveys, Inc. Flight Time: September, 1973 and June 17, 1974 Scale: 1” = 400

This dataset is a tile mosaic of 1-meter aerials of the City of Tacoma from 1990.Contact Info: Contact Info: GIS Team Email: GISteam@cityoftacoma.org Company: U.S. Geological Survey Flight Time: July, 1990 Filename: Digital Orthophoto Quarter Quadrangles (HTM) Earth Explorer Full Display Record 1 (HTM)

The true color orthoimages were acquired as part of the DC Geographic Information System (DC GIS) and captured at 1 foot resolution. A companion downloadable mosaic is available as a compressed MrSID format.

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.

The true color orthoimages were acquired as part of the DC Geographic Information System (DC GIS) and captured at 0.3-meter pixel resolution (approximately 1-foot). A companion downloadable mosaic is available as a compressed MrSID format.

The true color orthoimages were acquired as part of the DC Geographic Information System (DC GIS) and captured at 15cm pixel resolution. A companion downloadable mosaic is available as a compressed MrSID format. The final orthophotography deliverable products for this project consist of 328 ortho tiles at a scale of 1 to 2400.