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Research article2001Peer reviewedOpen access

Clarification of the mirage method for boundary correction, with possible bias in plot and point sampling

Ducey, Mark J.; Gove, Jeffrey H.; Ståhl, Göran; Ringvall, Anna

Abstract

While the mirage method of boundary overlap correction has been shown to be unbiased, an emphasis on the case of circular inclusion zones has led to an ambiguity in its presentation in much of the literature, We present a clarification of the method and show that its incorrect application leads to bias. We further show that depending on the method of slope correction, the potential for bias extends to variable radius plot sampling, Correct application of the mirage method has implications for when plots should be reflected, and how borderline trees should be handled on the reflected plots.

Keywords

forest sampling; reflection; relascope; prism cruising

Published in

Forest Science
2001, volume: 47, number: 2, pages: 242-245
Publisher: SOC AMER FORESTERS

SLU Authors

  • Ståhl, Göran

    • Sveriges lantbruksuniversitet, Swedish University of Agricultural Sciences

  • Hedström Ringvall, Anna

    • Sveriges lantbruksuniversitet, Swedish University of Agricultural Sciences

UKÄ Subject classification

Forest Science

Publication identifier

  • DOI: https://doi.org/10.1093/forestscience/47.2.242

Permanent link to this page (URI)

https://res.slu.se/id/publ/41899