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U.S. Geological Survey
Open-File Report 2006-1141

Processed 1938 Aerial Photography for Selected Areas of the Lower Colorado River, Southwestern United States

By Laura M. Norman, Michael Gishey, Leila Gass, Brian Yanites, Edwin Pfeifer, Ron Simms, and Ray Ahlbrandt


thumbnail of map showing lower Colorado River with boxes drawn up and down the river around the line of mosaics covered by this report
Extents of 1938 photomosaics of the
Lower Colorado River (from figure 6)

The U.S. Geological Survey (USGS) initiated a study of the Lower Colorado River to derive temporal-change characteristics from the predam period to the present. In this report, we present summary information on accomplishments under a USGS task for the Department of the Interior’s Landscapes in the West project. We discuss our preliminary results in compiling a digital database of geospatial information on the Lower Colorado River and acquisition of data products, and present a geospatial digital dataset of 1938 aerial photography of the river valley. The U.S. Bureau of Reclamation (BOR)’s, Resources Management Office in Boulder City, Nev., provided historical aerial photographs of the river valley from the Hoover Dam to the United States-Mexican border, with some exclusions. USGS authors scanned and mosaicked the photographs, registered the photo mosaics, and created metadata describing each mosaic series, all 15 of which are presented here.

Download the text of this publication as a 116-page PDF file (of2006-1141.pdf; 28.8 MB)

View the readme file for the imagery data as an ASCII text file (of2006-1141_readme.txt; 1 page, 48 KB)

Go to the metadata folder that contains a metadata file on each of the fifteen mosaics. These data are also included in the .zip file linked below and in Appendix A of the .pdf file linked above. (of2006-1141_metadata; 15 files, 840 KB total)

Download imagery as a .zip file (; compressed file containing 60 items; 520.4 MB compressed, 582 MB unzipped)

For questions about the content of this report, contact Laura Norman

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Maintained by: Michael Diggles
Date created: May 10, 2006
Last modified: May 11, 2006 (mfd)