VARIABLE DENSITY GRID-BASED SAMPLING DESIGNS FOR CONTINUOUS SPATIAL POPULATIONS
✍ Scribed by DON L. STEVENS JR
- Publisher
- John Wiley and Sons
- Year
- 1997
- Tongue
- English
- Weight
- 513 KB
- Volume
- 8
- Category
- Article
- ISSN
- 1180-4009
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✦ Synopsis
Many environmental resources, such as mineral resources or vegetation cover, or environmental attributes, such as chemical concentration in a stream or benthic community structure, are most appropriately sampled as continuous populations distributed over space, but most applied sampling theory and methodology is concerned with ®nite, discrete populations. This paper reports sampling methodology that explicitly recognizes the continuous nature of ecological resources. A family of designs are developed to permit control of the spatial dispersion of the sample, variable spatial density, and nested subsampling. The designs have non-zero joint inclusion probability densities, so that rigorous design-based inference and variance estimation are possible.