USDA Forest Service
 

Pacific Southwest Research Station

 

Pacific Southwest Research Station
800 Buchanan Street
Albany, CA 94710-0011

(510) 559-6300

United States Department of Agriculture Forest Service. USDA logo which links to the department's national site. Forest Service logo which links to the agency's national site.

Publications and Products

Order a printed copy
of this publication.

Research Note

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

Station ID: RN-PSW-151

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

View and Print this Publication ()

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.

Last Modified: May 24, 2011 06:50:08 PM