Evaluating Accuracy of Tree Measurements made with Optical Instruments
Abstract:Several steps are needed to assay accuracy of optical instruments used to measure tree height and upper-stem diameter. Preliminary tests establish basic instrumental and observer accuracy under easy measuring conditions. In the forest, accuracy deteriorates because visibility is impaired. By use of controls and comparison with accurate linear measures, sources and size of most bias and blunders can be identified. Accuracy is limited by an interaction of instrument, observer, and conditions of measurement. Forest Sci. 21:421-426.
Document Type: Journal Article
Affiliations: Chief Mensurationist, Pacific Northwest Forest and Range Experiment Station, Forest Service, U.S. Department of Agriculture, Portland, Oregon
Publication date: December 1, 1975
More about this publication?
- Forest Science is a peer-reviewed journal publishing fundamental and applied research that explores all aspects of natural and social sciences as they apply to the function and management of the forested ecosystems of the world. Topics include silviculture, forest management, biometrics, economics, entomology & pathology, fire & fuels management, forest ecology, genetics & tree improvement, geospatial technologies, harvesting & utilization, landscape ecology, operations research, forest policy, physiology, recreation, social sciences, soils & hydrology, and wildlife management.
Forest Science is published bimonthly in February, April, June, August, October, and December.
2015 Impact Factor: 1.702
Ranking: 16 of 66 in forestry
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Journal of Forestry
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