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Publication Information

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Title: Remeasuring tree heights on permanent plots using rectangular coordinates and one angle per tree

Author: Neal, Robert L. Jr.;

Date: 1973

Source: Forest Science. 19(3): 233-236

Publication Series: Scientific Journal (JRNL)

Description: Heights of permanent sample trees with tops visible from any point can be measured from that point with any clinometer, measuring one vertical angle per tree. Two horizontal angles and one additional vertical angle per observation point are necessary to orient the point to the plot. Permanently recorded coordinates and elevations of tree locations are used with the angles to calculate the instrument location and elevation, instrument-to-tree distance, and total tree height. The method is efficient only if a programmable calculator or a computer can be used for calculations. Procedures and formulas are suggested, including formulas for calculating the coordinates of tree locations in a plantation plot from tree identification numbers. Error relationships are discussed. Applications are suggested and one test is described.

Keywords: Spacing studies, stands, computers

Publication Notes:

  • We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
  • This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.



Neal, R.L., Jr. 1973. Remeasuring tree heights on permanent plots using rectangular coordinates and one angle per tree. Forest Science. 19(3): 233-236.


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