Optical Dendrometers For Out-Of-Reach Diameters: A Conspectus And Some New Theory

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Three main classes of optical dendrometers are discussed: forks, calipers, and rangefinders. Noncoincident, nonmagnifying dendrometers have little promise. Some improved designs with promise are mentioned. A new exact theory for rangefinder-dendrometers is presented for the first time and is translated into a highspeed computer program converting instrument readings to tree volume, etc., in about a second. Field tests suggest rangefinder-dendrometer volumes will vary no more than ± 4 percent from individual-tree check estimates.

Document Type: Journal Article

Affiliations: Research Forester, Pacific Southwest Forest and Range Experiment Station, Forest Service, U.S. Department of Agriculture, Berkeley, California

Publication date: June 1, 1963

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  • 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.
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