research-article

A three-phase sampling extension of the generalized regression estimator with partially exhaustive information

Publication: Canadian Journal of Forest Research16 December 2013https://doi.org/10.1139/cjfr-2013-0449

Abstract

We consider three-phase sampling schemes in which one component of the auxiliary information is known in the very large sample of the so-called null phase and the second component is available only in the large sample of the first phase, whereas the second phase provides the terrestrial inventory data. We extend to three-phase sampling the generalized regression estimator that applies when the null phase is exhaustive, for global and local estimation, and derive its asymptotic design-based variance. The new three-phase regression estimator is particularly useful for reducing substantially the computing time required to treat exhaustively very large data sets generated by modern remote sensing technology such as LiDAR.

Résumé

Nous proposons un nouvel estimateur pour les inventaires forestiers utilisant des plans de sondage à trois phases pour lesquels l’information auxiliaire consiste en une première composante connue en chaque point de la phase « nulle » et une seconde composante connue seulement en chaque point de la première phase, alors que la deuxième phase consiste en l’inventaire terrestre. Nous proposons une nouvelle version de l’estimateur par regression, aussi bien pour l’estimation globale que locale, et nous donnons la variance asymptotique sous le plan de sondage. Le nouvel estimateur est particulièrement utile pour réduire substantiellement le temps de calcul requis pour un traitement exhaustif de très grandes bases de données obtenues par les moyens modernes de télédétection tels que LiDAR.

References

Fattorini L., Marcheselli M., and Pisani C. 2006. A three-phase sampling strategy for large-scale multiresource forest inventories. J. Agric. Biol. Environ. Stat. 11: 296–316.
Mandallaz, D. 2008. Sampling techniques for forest inventories. Chapman and Hall, Boca Raton, Florida.
Mandallaz D. 2013a. Design-based properties of some small-area estimators in forest inventory with two-phase sampling. Can. J. For. Res. 43(5): 441–449.
Mandallaz, D. 2013b. Regression estimators in forest inventories with three-phase sampling and two multivariate components of auxiliary information. Technical report, ETH Zurich, Department of Environmental Systems Science. Available from http://e-collection.library.ethz.ch.
Mandallaz D., Breschan J., and Hill A. 2013. New regression estimators in forest inventory with two-phase sampling and partially exhaustive information: a design-based Monte Carlo approach with applications to small-area estimation. Can. J. For. Res. 43(11): 1023–1031.
von Lüpke N., Hansen J., and Saborowski J. 2012. A three-phase sampling procedure for continuous forest inventory with partial re-measurement and updating of terrestrial sample plots. Eur. J. For. Res. 131: 1979–1990.

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Published In

Canadian Journal of Forest Research cover image
Canadian Journal of Forest Research
Volume 44Number 42014
Pages: 383 - 388

History

Received: 1 November 2013
Accepted: 13 December 2013
Published online: 16 December 2013

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Authors

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Daniel Mandallaz
ETH Zurich, Department of Environmental Systems Science, Chair of Land Use Engineering, CHN K74.1, CH 8092 Zurich, Switzerland.

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