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Title: Estimating tree heights from shadows on vertical aerial photographs
Author: Rogers, Earl J.;
Source: Station Paper NE-12. Philadelphia, PA: U.S. Department of Agriculture, Forest Service, Northeastern Forest Experiment Station. 1-16.
Publication Series: Science Perspectives (SP)
Description: Aerial photographs are now being applied more and more to practical forestry - especially to forest survey. Many forest characteristics can be recognized on aerial photographs in greater detail than is possible through ground methods alone. The basic need is for tools and methods for interpreting the detail in quantitative terms.
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Rogers, Earl J. 1947. Estimating tree heights from shadows on vertical aerial photographs. Station Paper NE-12. Philadelphia, PA: U.S. Department of Agriculture, Forest Service, Northeastern Forest Experiment Station. 1-16.
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