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Self-referencing Taper Curves for Loblolly Pine

Author(s):

Mike Strub
Chris Cieszewski
David Hyink

Year:

2005

Publication type:

General Technical Report (GTR)

Primary Station(s):

Northern Research Station

Historical Station(s):

North Central Research Station

Source:

In: McRoberts, Ronald E.; Reams, Gregory A.; Van Deusen, Paul C.; McWilliams, William H.; Cieszewski, Chris J., eds. Proceedings of the fourth annual forest inventory and analysis symposium; Gen. Tech. Rep. NC-252. St. Paul, MN: U.S. Department of Agriculture, Forest Service, North Central Research Station. 59-64

Description

We compare the traditional fitting of relative diameter over relative height with methods based on self-referencing functions and stochastic parameter estimation using data collected by the Virginia Polytechnic Institute and State University Growth and Yield Cooperative. Two sets of self-referencing equations assume known diameter at 4.5 feet inside (dib) and outside (dob) bark; and one set assumes known only dob at 4.5 feet. A fourth degree polynomial in one minus relative height describes taper. The proposed methods improved the error sum of squares by up to 47 percent over the traditional method.

Citation

Strub, Mike; Cieszewski, Chris; Hyink, David. 2005. Self-referencing Taper Curves for Loblolly Pine. In: McRoberts, Ronald E.; Reams, Gregory A.; Van Deusen, Paul C.; McWilliams, William H.; Cieszewski, Chris J., eds. Proceedings of the fourth annual forest inventory and analysis symposium; Gen. Tech. Rep. NC-252. St. Paul, MN: U.S. Department of Agriculture, Forest Service, North Central Research Station. 59-64

Publication Notes

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https://www.fs.usda.gov/treesearch/pubs/14388