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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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