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    Author(s): John Coulston
    Date: 2008
    Source: Res. Note SRS-16. Asheville, NC: U.S. Department of Agriculture, Forest Service, Southeastern Forest Experiment Station. 8 p.
    Publication Series: Research Note (RN)
    Station: Southern Research Station
    PDF: View PDF  (1.59 MB)

    Description

    The Forest Inventory and Analysis (FIA) Program uses stratified estimation techniques to produce estimates of forest attributes. Stratification must be unbiased and stratification procedures should be examined to identify any potential bias. This note explains simple techniques for identifying potential bias, discriminating between sample bias and stratification bias, and determining the magnitude of the effect of stratification bias on forest area estimates. The key recommendation is that checks and balances should be incorporated into the FIA processing system to reduce the likelihood of bias caused by stratification.

    Publication Notes

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    • This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.

    Citation

    Coulston, John. 2008. Forest inventory and stratified estimation: a cautionary note. Res. Note SRS-16. Asheville, NC: U.S. Department of Agriculture, Forest Service, Southeastern Forest Experiment Station. 8 p.

    Keywords

    bias, FIA, national land cover dataset, photointerpretation, proportional allocation

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