Image rectification for recompiling and digitizing soil survey maps.

TitleImage rectification for recompiling and digitizing soil survey maps.
Publication TypeJournal Article
Year of Publication2002
AuthorsBeck, JM, Shaw, JN, Chaney, PL, Hairston, JE
JournalJournal of Soil & Water Conservation
Pages5 - 5
Date Published03/2002
ISBN Number00224561
KeywordsAERIAL photography, Digitizing, FINITE element method, MAP scales, rectification, soil survey maps, SOIL surveys, UNITED States, UNITED States. Natural Resources Conservation Service
AbstractThe U.S. Department of Agriculture Natural Resources Conservation Service (USDA NRCS) is placing soil survey data in digital format. To accomplish this mission, existing soil survey information must be digitized. Map scale differences and publication of older surveys on non-ortho aerial photography complicates this task. For effective use, soil survey maps need to be recompiled and digitized to an ortho-photo base at 1:24,000. This paper describes an image matching technique to facilitate the recompilation and digitization of published soil survey reports. In addition, the accuracy of using a polynomial equation versus a triangle-based finite element approach for rectifying non-ortho aerial photographs to digital ortho-photo quadrangles (DOQs) was evaluated. It was hypothesized that the triangle-based method would be more accurate if a large number of ground control points (GCPs) were used. However, results showed that accuracy differences were minimal and that the critical factor was the quality, not quantity, of GCPs. Our image matching technique is a cost effective digitizing approach for regions of low to moderate relief. [ABSTRACT FROM AUTHOR]Copyright of Journal of Soil & Water Conservation is the property of Soil & Water Conservation Society and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Short TitleJournal of Soil & Water Conservation
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