Migrant agricultural worker’s family. Seven children without food. Mother aged thirty-two. Father is a native Californian. Nipomo, California. By Dorothea Lange, March 1936

The photographs in the collection were taken between 1935 and 1943, as part of a project to document federal aid programmes during the Great Depression. This original project was the brainchild of the Farm Security Administration (FSA).

The photographs were digitised by the Library of Congress. Yale’s Photogrammar project is centred around creating new ways to search through them.

The site allows for searching through the collection by photographer, by lot number, by classification tags, by location or by year.

It also includes an interactive map of the United States, with dots marking where each photograph was taken. This too can be sorted by photographer.

The collection includes images from famous photographers of the Depression era, including Dorothea Lange and Walker Evans. A search for photographs by Dorothea Lange throws up more than 3200 results.

Allie Mae Burroughs, wife of cotton sharecropper. Hale County, Alabama. By Walker Evans, 1935

Try out Photogrammar here