Prism cruising with diameter classes: Theoretical considerations and practical recommendations.
The usual formulas for estimating tree density from prism cruise data presume that dbh has been measured exactly. In practice, trees are often tallied by diameter class using inexact measurements. Without further information, this can bias estimates of tree density, especially for trees of small diameter or trees in wide diameter classes. Here, tables of expansion factors that utilize prior information about stand diameter distribution are presented and compared with conventional methods of estimating tree density. The context of the cruise, and assumptions about the stand, have important implications for measurement and calculation protocols in prism cruising.
Northern Journal of Applied Forestry
Ducey, M.J.Prism cruising with diameter classes: Theoretical considerations and practical recommendations. (2000) Northern Journal of Applied Forestry, 17 (3), pp. 110-115.