Site-quality (site-productivity) information underpins many aspects of radiata pine plantation management in South Australia. Site-quality assessment is, in essence, a problem of assessing the spatial variation in stand volume at reference age. Trials examining the use of airborne Light
Detection And Ranging (LiDAR) for site-quality assessment were commenced in 2002. LiDAR data was captured using three different LiDAR systems in 2002, 2006 and 2007, generating datasets captured at significantly different flying altitudes and point densities. A total of 169 field plots were
measured across nine study sites. The study evaluated how operational LiDAR data-collection parameters (Campaign) and site characteristics (Site) affected LiDAR variables and prediction models for predominant height and stand volume. Significant Campaign effects were detected, which appeared
to be due to differences in laser point density and flying height, instrumentation or seasonal effects such as drought. The effects were far more pronounced in models for stand volume than predominant height. Evidence of Site effects was inconclusive, but incorporation of Site variables in
prediction models improved model fit under some circumstances. LiDAR-based site-quality assessment proved robust, even at the lowest point densities of LiDAR used in the study. Calibration protocols and modelling strategies that recognize Campaign effects need to be developed for operational
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Document Type: Research Article
Department of Forest and Ecosystem Science, University of Melbourne, Parkville, Victoria, Australia,Forestry SA, Mount Gambier, SA, Australia
Department of Forest and Ecosystem Science, University of Melbourne, Parkville, Victoria, Australia
Forestry Systems, Mount Gambier, SA, Australia
Publication date: 2010-02-01
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