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Digital Surface Models (DSMs) of the Kajaki Dam, Afghanistan, Derived from 1952 Fairchild aerial photography and 2006 SPOT-5 HRG satellite imagery

Metadata Updated: October 30, 2025

This study applied historical aerial imagery and satellite imagery to create digital surface models (DSMs) of the Helmand River Valley situated in southwestern Afghanistan. The historical imagery, collected in 1952 by Fairchild Aerial Surveys Incorporated (FAS), at 1:40,000 scale, represents the earliest known aerial photographic archive of the Helmand Valley landscape. Structure-from-motion (SfM) multi-view stereo (MVS) photogrammetric techniques were used together with ground control points collected from high resolution satellite imagery to create a 5m digital elevation model (DEM) and 2m orthoimage. The historical DEM was evaluated for accuracy against a 2006 5m DEM using SPOT-5 HRG satellite imagery which was generated through stereo-autocorrelation techniques. The extraction of these historic data products are significant because they characterize the terrain and land cover of the valley at the time of the Kajaki (or Kajakai) Dam construction and prior to the expanding reservoir. Moreover, this study serves as one of a select few applications wherein historical imagery and DSMs derived from SfM techniques fill the gap of geospatial data prior to the era of satellite imagery coverage. The outputs of this study offer a glimpse into the Helmand Valley’s landscape, waterscape, and elevation in the 1950s, providing a digital historical dataset that can be used in present day research.

Access & Use Information

Public: This dataset is intended for public access and use. License: No license information was provided. If this work was prepared by an officer or employee of the United States government as part of that person's official duties it is considered a U.S. Government Work.

Downloads & Resources

Dates

Metadata Created Date September 13, 2025
Metadata Updated Date October 30, 2025

Metadata Source

Harvested from DOI USGS DCAT-US

Additional Metadata

Resource Type Dataset
Metadata Created Date September 13, 2025
Metadata Updated Date October 30, 2025
Publisher U.S. Geological Survey
Maintainer
Identifier http://datainventory.doi.gov/id/dataset/usgs-65492056d34ee4b6e05c220c
Data Last Modified 2024-02-23T00:00:00Z
Category geospatial
Public Access Level public
Bureau Code 010:12
Metadata Context https://project-open-data.cio.gov/v1.1/schema/catalog.jsonld
Metadata Catalog ID https://ddi.doi.gov/usgs-data.json
Schema Version https://project-open-data.cio.gov/v1.1/schema
Catalog Describedby https://project-open-data.cio.gov/v1.1/schema/catalog.json
Harvest Object Id 66e1479c-055b-4f14-b5fd-60cd6393b5bf
Harvest Source Id 2b80d118-ab3a-48ba-bd93-996bbacefac2
Harvest Source Title DOI USGS DCAT-US
Metadata Type geospatial
Old Spatial 64.9836, 32.2178, 65.4723, 32.4860
Source Datajson Identifier True
Source Hash 8b7127b25eb28e7852707b719e233d0ed484789f56807579dce186c14d49fada
Source Schema Version 1.1
Spatial {"type": "Polygon", "coordinates": 64.9836, 32.2178, 64.9836, 32.4860, 65.4723, 32.4860, 65.4723, 32.2178, 64.9836, 32.2178}

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