Corson (1938 Part A) County, SD Air Photos
Pedology CD 03-35

D.D. Malo, M.G. Filholm, and M.K. Wessel 

The air photos on this CD were scanned at a resolution of 200 dots/inch and the images are stored in tagged image format (*.tif). The images were scanned using a grayscale. The images on this CD are not easily available from other sources (e.g., USDA-NRCS or EROS Data Center) and were scanned to preserve them for future use. The paper copies of the air photos were deteriorating and this method was used to keep the information. The photos are from Corson (1938 Part A) County, SD. No index map was prepared for the photos. The scale of the original photos was 1:20,000 or 3.17 inches = 1 mile. The inventory of images does not represent coverage of the entire county. The images contained on this CD represent part of the air photo collection for Corson County, SD that the South Dakota State University (SDSU) Pedology Project had on October 2003.   
 
The structure of the files on the CD is as follows:
1. There is a file folder for the county (e.g., Corson).
2. Within the county folder there is a folder for the year and month of the air photos (e.g., 1938Aug).
3. Within the year folder there are files for each photo scanned. The images are identified by the code used on the original photo/image. There is a county ID, a flight ID, and a photo ID on each air photo and that is what was used to name the image (e.g., BNV-71-03).		(MORE)
4. Where possible, the original photo ID information was scanned with the photo (top of the image). 
5. Where more than one scan of an image was needed to scan all the image, the image ID was followed by an additional set of letters to indicate what part of the image the scan represents (e.g., BNV-71-07BTM = bottom of image BNV-71-07).
6. Corson County, SD photo code – BNV. 

This CD contains 205 images from 1938 for Corson County, SD.

Additional images for counties in SD are available (cost = $12/CD) from:

Pedology Project
Box 2140C, NPB 247C
Plant Science Department
South Dakota Agricultural Experiment Station
South Dakota State University
Brookings, SD 57007-2141

VOICE: 605.688.4586
FAX: 605.688.4452
Email: Douglas_Malo@sdstate.edu