Most of the photos on this site were extracted from reference images (high-resolution tiffs, 20 to 200 megabytes in size) from the Library of Congress research archive. (To query the database click here.) Many were digitized by LOC contractors using a Sinar studio back. They are adjusted by your webmaster for contrast and color in Photoshop before being downsized and turned into the jpegs you see here.

Santa Fe R.R. train stopping for coal and water at Laguna, New Mexico. March 1943. View full size. 4x5 Kodachrome transparency by Jack Delano.
What great picture, with snow in the desert, what's HDR stand for?
[HDR = High Dynamic Range imaging. - Dave]
Looks pretty like a HDR image
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