Timber Volume Stratification on Small-Scale Aerial Photos
Author: MacLean, Colin D.
Source: Journal of Forestry, Volume 79, Number 11, 1 November 1981 , pp. 739-740(2)
Publisher: Society of American Foresters
Abstract:Data from a timber inventory of western Oregon were analyzed to test whether interpretation of photos with a scale of 1:63.000 could be used to improve efficiency of timber volume estimates. When photo plots classified on this scale were used to stratify a field sample, the resulting double-sample design provided estimates of total cubic-foot volume with twice the efficiency of a simple field-plot survey--i.e., precision was improved without an increase in cost. Results were similar to those obtained from an earlier study testing interpretation on 1:12,000 to 1:20,000 scale photos.
Document Type: Journal Article
Affiliations: Mensurationist at the Pacific Northwest Forest and Range Experiment Station, USDA Forest Service, Portland, Oregon
Publication date: 1981-11-01
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