Estimating Beetle-Killed Douglas-Fir by Aerial Photo and Field Plots
Authors: Wear, J. F.; Pope, R. B.; Lauterbach, P. G.
Source: Journal of Forestry, Volume 62, Number 5, 1 May 1964 , pp. 309-315(7)
Publisher: Society of American Foresters
Abstract:Color and panchromatic aerial photographs provide a reliable means for estimating epidemic tree killing by the Douglas-fir beetle (Dendroctonus pseudotsugae [Hopk.]). For this purpose, color photographs are more efficient than panchromatic. Sequential color photography taken annually may be used to record the course of an epidemic. By regression sampling, taking a large number of inexpensive photo plots and ground checking a small number of expensive field plots, a survey of equal accuracy is obtained at less cost than by a straight field survey. A procedure is outlined for conducting aerial photo-graphic surveys of Douglas-fir beetle epidemics.
Document Type: Journal Article
Affiliations: Project Forester with Weyerhaeuser Company, Centralia, Wash.
Publication date: 1964-05-01
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