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Open-File Report 02-324

Digital Soils Survey Map of the Patagonia Mountains, Arizona

By Laura Norman, Craig Wissler, D. Phillip Guertin, and Floyd Gray

Thumbnail of and link to report PDF (2.8 MB)Abstract

The `Soil Survey of Santa Cruz and Parts of Cochise and Pima Counties, Arizona,' a product of the USDA's Soil Conservation Service and the Forest Service in cooperation with the Arizona Agricultural Experiment Station, released in 1979, was created according to the site conditions in 1971, when soil scientists identified soils types on aerial photographs. The scale at which these maps were published is 1:20,000. These soil maps were automated for incorporation into the hydrologic modeling within a GIS. The aerial photos onto which the soils units were drawn had not been orthoganalized, and contained distortion. A total of 15 maps composed the study area. These maps were scanned into TIFF format using an 8-bit black and white drum scanner at 100 dpi. The images were imported into ERDAS IMAGINE and the white borders were removed through subset decollaring processes. Five CD-ROM's containing Digital Orthophoto Quarter Quads (DOQQ's) were used to register and rectify the scanned soils maps. Polygonal data was then attributed according to the datasets.

First posted September 4, 2002

For additional information, contact:
Western Geographic Science Center
U.S. Geological Survey
520 Park Avenue, Room 106
Tucson, AZ 85719

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Suggested citation:

Norman, Laura, Wissler, Craig, Guertin, D. Phillip, Gray, Floyd, 2002, Digital Soils Survey Map of the Patagonia Mountains, Arizona: U.S. Geological Survey Open-File Report 02-324, 24 pp.,




Description of map units

Data sources, processing, and accuracy

GIS documentation

Obtaining digital data

Obtaining paper maps


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