The recent increased availability of information about the micro-geographic positions of population units in environmental surveys has led to important developments in spatial sampling methodologies and, as a result, has improved the estimation accuracy. In real data, however, information about the location of units is often affected by inaccuracy about their exact spatial positions, and these non-sampling errors can affect the estimation procedure. This paper aims to investigate the effects of positional errors on total estimation through a Monte-Carlo simulation study based on real populations of trees. Starting from perfect positioning, we examine two typical types of coarsening that frequently impact two different species of trees. The simulation results show that the exploitation of spatial information to estimate population totals continues to be relevant in the context of environmental surveys, even in the presence of inaccuracies.

Design-based estimation in environmental surveys with positional errors / Dickson, Maria Michela; Giuliani, Diego; Espa, Giuseppe; Bee, Marco; Taufer, Emanuele; Santi, Flavio. - In: ENVIRONMENTAL AND ECOLOGICAL STATISTICS. - ISSN 1352-8505. - STAMPA. - 2018, 25:1(2018), pp. 155-169. [10.1007/s10651-017-0381-3]

Design-based estimation in environmental surveys with positional errors

Dickson, Maria Michela;Giuliani, Diego;Espa, Giuseppe;Bee, Marco;Taufer, Emanuele;Santi, Flavio
2018-01-01

Abstract

The recent increased availability of information about the micro-geographic positions of population units in environmental surveys has led to important developments in spatial sampling methodologies and, as a result, has improved the estimation accuracy. In real data, however, information about the location of units is often affected by inaccuracy about their exact spatial positions, and these non-sampling errors can affect the estimation procedure. This paper aims to investigate the effects of positional errors on total estimation through a Monte-Carlo simulation study based on real populations of trees. Starting from perfect positioning, we examine two typical types of coarsening that frequently impact two different species of trees. The simulation results show that the exploitation of spatial information to estimate population totals continues to be relevant in the context of environmental surveys, even in the presence of inaccuracies.
2018
1
Dickson, Maria Michela; Giuliani, Diego; Espa, Giuseppe; Bee, Marco; Taufer, Emanuele; Santi, Flavio
Design-based estimation in environmental surveys with positional errors / Dickson, Maria Michela; Giuliani, Diego; Espa, Giuseppe; Bee, Marco; Taufer, Emanuele; Santi, Flavio. - In: ENVIRONMENTAL AND ECOLOGICAL STATISTICS. - ISSN 1352-8505. - STAMPA. - 2018, 25:1(2018), pp. 155-169. [10.1007/s10651-017-0381-3]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11572/182727
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