Skip to page content
USDA Forest Service

Research & Development Treesearch

Treesearch Home
About Treesearch
Contact Us
Research & Development
Forest Products Lab
International Institute of Tropical Forestry
Pacific Northwest
Pacific Southwest
Rocky Mountain
Southern Research Station
Help - We Participate  Government Made Easy

Global Forest Information Service

US Forest Service
P.O. Box 96090
Washington, D.C.

(202) 205-8333

You are here: Home / Search / Publication Information
Bookmark and Share

Publication Information

View PDF (1.2 MB)

Title: Line intersect sampling: Ell-shaped transects and multiple intersections

Author: Gregoire, Timothy G.; Valentine, Harry T.;

Date: 2003

Source: Environmental and Ecological Statistics. 10: 263-279

Publication Series: Miscellaneous Publication

Description: The probability of selecting a population element under line intersect sampling depends on the width of the particle in the direction perpendicular to the transect, as is well known. The consequence of this when using ell-shaped transects rather than straight-line transects are explicated, and modifications that preserve design-unbiasedness of Kaiser's (1983) conditional and unconditional estimators are presented. A case against beating multiple intersections as multiple probabilistic events is argued on the basis, also, of preserving design-unbiased estimation.

Keywords: conditional estimator, design-unbiasedness, line intercept sampling, particles

Publication Notes:

  • We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
  • This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.
  • This publication may be available in hard copy. Check the Northern Research Station web site to request a printed copy of this publication.
  • Our on-line publications are scanned and captured using Adobe Acrobat. During the capture process some typographical errors may occur. Please contact Sharon Hobrla, if you notice any errors which make this publication unusable.



Gregoire, Timothy G.; Valentine, Harry T. 2003. Line intersect sampling: Ell-shaped transects and multiple intersections. Environmental and Ecological Statistics. 10: 263-279


 [ Get Acrobat ]  Get the latest version of the Adobe Acrobat reader or Acrobat Reader for Windows with Search and Accessibility

USDA logo which links to the department's national site. Forest Service logo which links to the agency's national site.