JSM 2005 - Toronto

Abstract #302327

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Legend: = Applied Session, = Theme Session, = Presenter
Activity Number: 427
Type: Invited
Date/Time: Wednesday, August 10, 2005 : 2:00 PM to 3:50 PM
Sponsor: WNAR
Abstract - #302327
Title: Stratified Estimation for Forest Inventory Applications Using Satellite Imagery
Author(s): Ronald E. McRoberts*+
Companies: U.S.D.A. Forest Service
Address: North Central Research Station, St Paul, MN, 55108, United States
Keywords: relative efficiency ; precision
Abstract:

Due to budgetary constraints and natural variability, sufficient numbers of forest inventory plots frequently cannot be measured to satisfy precision guidelines for the estimates of many variables unless estimation is enhanced using ancillary data. Satellite imagery has been accepted as a source of ancillary data that can be used with stratified estimation techniques to increase the precision of estimates with little corresponding increase in cost. Results to date indicate that with this approach, relative efficiencies as large as 2.5--5.0 may be achieved for some inventory variables. This presentation summarizes several aspects of stratification research and proposes a new approach to stratification using satellite imagery that may increase relative efficiencies by an order of magnitude.

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Revised March 2005