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Smoothing Top Height Estimates from Two Lodgepole Pine Height Models

Author(s) or contact(s): G.D. Nigh
Source: Research Branch
Subject: Growth and Yield
Series: Extension Note
Other details:  Published 1999. Hardcopy is available.


The two models for estimating the top height of lodgepole pine (Pinus contorta var. latifolia Dougl.) are designed to function over different age ranges: a juvenile height model for total ages below 15 and a height-age model above breast height age . Four options are available to splice these models together to give a smooth height trajectory near the splice point. The option resulting in the smoothest trajectory uses the juvenile height model below breast height age 0 and the height-age model above breast height age 2, and linearly interpolates heights between breast height age 0 and 2.

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Updated April 19, 2007