5 Result(s)
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Article
Open AccessHarmonization of design-based map** for spatial populations
The map** of a survey variable throughout a continuum or for finite populations of units is usually performed from a model-dependent perspective. Nevertheless, when a sample of locations/units is selected by...
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Article
Estimating wild boar density in hunting areas by a probabilistic sampling of drive counts
The evaluation of wild boar density in a hunting district can be performed by accurate drive counts of boars within the drive areas assigned to each hunting team. Because a complete driving of all the areas is...
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Article
Estimation of small woodlot and tree row attributes in large-scale forest inventories
Forest surveys performed over a large scale (e.g. national inventories) involve several phases of sampling. The first phase is usually performed by means of a systematic search of the study region, in which th...
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Article
Variance decomposition in two-stage plot sampling: theoretical and empirical results
The statistical properties of two-stage plot sampling estimators of abundance are considered. In the first stage, some spatial units are selected over the whole study area according to a suitable sampling desi...
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Article
The use of replicated plot, line and point sampling for estimating species abundance and ecological diversity
The paper deals with the problem of estimating diversity indexes for an ecological community. First the species abundances are unbiasedly and consistently estimated using designs based on n random and independ...
