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Title: Stratifying photo plots into volume classes...by crown closure comparator

Author: Aldrich, Robert C.;

Date: 1967

Source: Res. Note PSW-RN-151. Berkeley, CA: U.S. Department of Agriculture, Forest Service, Pacific Southwest Forest and Range Experiment Station. 2 p

Publication Series: Research Note (RN)

Description: As an aid to aerial photo interpretation, a Crown Closure Comparator has been developed. Printed as a positive film transparency, this device shows tree crowns as open dots on a black background. The Comparator is used to stratify I-acre plots into broad volume classes on single aerial photos using 4 crown-diameter and 9 crown-closure classes. It can also be used for stereo classification with mirror-type stereoscopes.

Keywords: forest inventory, stand volume, crown closure, crown diameter, aerial surveying, photo interpretation, comparator, stereo comparator

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.

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Citation:


Aldrich, Robert C. 1967. Stratifying photo plots into volume classes...by crown closure comparator. Res. Note PSW-RN-151. Berkeley, CA: U.S. Department of Agriculture, Forest Service, Pacific Southwest Forest and Range Experiment Station. 2 p.

 


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