You are here: Home
/ Publication Information
Title: True versus perturbed forest inventory plot locations for modeling: a simulation study
Author: Coulston, John W.; Riitters, Kurt H.; McRoberts, Ronald E.; Reams, Greg A.; Smith, William D.;
Source: Canadian journal of forest research. 36(3): 801-807
Publication Series: Miscellaneous Publication
Description: USDA Forest Service Forest Inventory and Analysis plot information is widely used for timber inventories, forest health assessments, and environmental risk analyses. With few exceptions, true plot locations are not revealed; the plot coordinates are manipulated to obscure the location of field plots and thereby preserve plot integrity. The influence of perturbed plot locations on the development and accuracy of statistical models is unknown. We tested the hypothesis that the influence is related to the spatial structure of the data used in the models. For ordinary kriging we examined the difference in mean square error based on true and perturbed plot locations across a range of spatial autocorrelations. We also examined the difference in mean square error for regression models developed with true and perturbed plot locations across a range of spatial autocorrelations and spatial resolutions. Perturbing plot locations did not significantly influence the accuracy of kriging estimates, but in some situations linear regression model development and accuracy were significantly influenced. Unless the independent variable has high spatial autocorrelation, only coarse spatial resolution data should be used to develop linear regression models.
Keywords: forest inventories, simulation models
- 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.
- You may send email to email@example.com to request a hard copy of this publication. (Please specify exactly
which publication you are requesting and your mailing address.)
XML: View XML
Coulston, John W.; Riitters, Kurt H.; McRoberts, Ronald E.; Reams, Greg A.; Smith, William D. 2006. True versus perturbed forest inventory plot locations for modeling: a simulation study. Canadian journal of forest research. 36(3): 801-807
Get the latest version of the Adobe Acrobat reader or Acrobat Reader for Windows with Search and Accessibility