Georectified mosaic of historical aerial photographs of the Colorado River in Palo Verde Valley, Arizona and California, acquired in 1930

This product is a georectified and tonally balanced mosaic of aerial photographs collected in 1930 by the U.S. Bureau of Reclamation along a portion of the floodplain of the Colorado River in Palo Verde Valley, Arizona and California. This dataset is a primary resource for the development of a surficial geologic map showing the floodplain and river channel characteristics along the Colorado River in Palo Verde Valley prior to significant flow regulation by Hoover Dam, and subsequently Parker Dam and Palo Verde Dam. Mosaic generation was performed by Digital Aerial Solutions, LLC.

In addition to the mosaic, the data release also includes individual digital aerial photographs (original scans and georeferenced; see the child items) that cover the area of interest. Supplemental files include image footprints, georeferencing procedures and accuracy reports supplied by the contractor, seamlines for the mosaic, image-to-image control points, and check points. All spatial data is in the NAD 1983 UTM Zone 11N coordinate system.