Abstract

In transect relascope sampling, a wide-angle relascope is used along survey lines for selecting a sample of objects that extend linearly in the plane, e.g. downed logs. The method is closely related to line intersect (intercept) sampling. In this article, a special case of the transect relascope technique is studied. Using a pi/2 radian relascope angle, the method becomes invariant to the orientation of the line objects in the population. The reason is that the area of inclusion around objects, through which a survey line should pass for an object to be included, turns out to be circular. In analytical studies and Monte Carlo simulations, the cost-efficiency of transect relascope and line intersect sampling is evaluated. It is found that transect relascope sampling is a competitive alternative to line intersect sampling in inventories of the total volume of coarse woody debris (in the form of downed logs:) in forest compartments.

Keywords

coarse woody debris; forest inventory; line intersect sampling; Monte Carlo; simulation; transect relascope sampling

Published in

Scandinavian Journal of Forest Research
1997, Volume: 12, number: 4, pages: 375-381
Publisher: SCANDINAVIAN UNIVERSITY PRESS

SLU Authors

• Ståhl, Göran

  • Department of Forest Resource Management and Geomatics, Swedish University of Agricultural Sciences
    

UKÄ Subject classification

Forest Science


Publication Identifiers

DOI: https://doi.org/10.1080/02827589709355426

Permanent link to this page (URI)

https://res.slu.se/id/publ/41914