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Ground cover estimated from aerial photographsEstimates of per cent ground cover made by ground observers were compared with independent estimates made on the basis of low-altitude (640-1219 m) aerial photographs of the same fields. Standard statistical simple correlation and linear regression analyses revealed a high correlation between the two estimation methods. In crops such as grain, sorghum, corn, and forage sorghum, in which the broadest part of the leaf canopy is near the top of the plant, there was a tendency to overestimate the per cent ground cover from aerial photographs.
Document ID
19760045015
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Gerbermann, A. H.
(Agricultural Research Service Weslaco, TX, United States)
Cuellar, J. A.
(Agricultural Research Service Weslaco, TX, United States)
Wiegand, C. L.
(U.S. Department of Agriculture Weslaco, Tex., United States)
Date Acquired
August 8, 2013
Publication Date
April 1, 1976
Publication Information
Publication: Photogrammetric Engineering and Remote Sensing
Volume: 42
Subject Category
Earth Resources And Remote Sensing
Accession Number
76A27981
Funding Number(s)
CONTRACT_GRANT: NASA ORDER R-09-038-002
Distribution Limits
Public
Copyright
Other

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