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Ground truth versus no ground truthThe area of study was the southeastern Arizona test site and three areas within the site were studied in detail: Safford, Point of Pines, and Fort Apache-White River. These areas have terrain contrast ranging from flat arid regions to high alpine mountains. Data were obtained from the Apollo 9 photographic missions, high altitude aerial photography, and simulated ERTS-A data from high altitude aircraft. Various monoscopic and steroscopic devices were used to analyze the features, and film density variations were studied. No ground-based data were permitted. Thematic maps were prepared for geology, geomorphology, vegetation, hydrology, and soils. Interpreted boundaries were delineated, with no collaborative data used in the interpretation. Ground-based data were gathered during the overflight of high altitude aerial photography. A further study was made using the ground truth, and the data gathered on the ground were compared with original mapping. 80% to 85% of the interpretations in the areas checked were correct. It was proved that it is possible to monitor gross features of the vigor of crop lands and vegetative cover, to type soils and classify geologic features, and to determine hydrologic conditions.
Document ID
19720004618
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Torbert, G. B.
(Bureau of Land Management Washington, DC, United States)
Date Acquired
August 6, 2013
Publication Date
January 1, 1970
Publication Information
Publication: NASA. Manned Spacecraft Center 3d Ann. Earth Resources Program Rev., vol. 1
Subject Category
Geophysics
Accession Number
72N12267
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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