[Aerial Photographs of Douglas County, Colorado, Series YI and ECB]Map
Enlarged photoprints reproduced from negatives. Original negative scale 1:20,000. Aerial photographs in series YI covers most of Douglas County, Colo. Collection coverage also includes the western areas that comprise the Pike National Forest, photographed by the U.S. Forest Service (series ECB). Includes photomosaic index for YI series flights completed 10-7-55 by Penna. Aerial Surveys, Inc., New Cumberland, Pa. Scale of index: ca 1:100,000.
Scale: Scale [ca. 1:7,920. ca. 1 in. to 660 ft.] (W 105°16ʹ--W 104°40ʹ/N 39°33ʹ--N 39°07ʹ)
Characteristics: 229 remote-sensing images ; 61 x 61 cm. or smaller + photomosaic index (1 remote-sensing image)