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    Author(s): Goran Stahl; Anna Ringvall; Jeffrey H. Gove; Mark J. Ducey
    Date: 2002
    Source: Forest Science. 48(1): 85-92.
    Publication Series: Scientific Journal (JRNL)
    Station: Northern Research Station
    PDF: Download Publication  (2.59 MB)


    In this article, the effect of sloping terrain on estimates in point and transect relascope sampling (PRS and TRS, respectively) is studied. With these inventory methods, a wide angle relascope is used either from sample points (PRS) or along survey lines (TRS). Characteristics associated with line-shaped objects on the ground are assessed, e.g., the length or volume of downed logs. In their basic forms, the methods only work in flat terrain, and thus bias is incurred under sloping conditions. Two different possibilities to correct for bias due to slope are presented.

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    Stahl, Goran; Ringvall, Anna; Gove, Jeffrey H.; Ducey, Mark J. 2002. Correction for slope in point and transect relascope sampling of downed coarse woody debris. Forest Science. 48(1): 85-92.


    angle gauge sampling, bias, Bitterlich sampling, correction factor, forest inventory, line intercept sampling

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