Related Archival Materials
Photographs in this series were created during aerial flights that spanned multiple decades and are either 1:24000 or 1:40000 in scale. The envelopes containing the photographs include information such as quadrangle name, date, scale, "flown for," and "flown by." Envelopes also have annotated photocopies indicating the portions of quadrangles covered by the photographs. Coverage is statewide.