caa a22 4500 469064641 CHVBK 20180323132904.0 cr unu---uuuuu 170328e19921001xx s 000 0 eng 10.1007/BF00890707 doi (NATIONALLICENCE)springer-10.1007/BF00890707 Design-based versus model-based sampling strategies: Comment on R. J. Barnes' "bounding the required sample size for geologic site characterization” [Elektronische Daten] [J. de Gruijter, C. ter Braak] Two fundamentally different sources of randomness exist on which design and inference in spatial sampling can be based: (a) variation that would occur on resampling the same spatial population with other sampling configurations generated by the same design, and (b) variation occurring on sampling other populations, hypothetically generated by the same spatial model, using the same sampling configuration. The former leads to the design-based approach, which uses classical sampling theory; the latter leads to the model-based approach and uses geostatistical theory. Failure to recognize these two sources of randomness causes misunderstanding about dependence of variables and the role of randomization in sampling, unwarranted narrowing down the choice of sampling strategies to those that are model-based, and abuse in simulation experiments. This is exemplified in Barnes' publication on the required sample size for geologic site characterization by nonparametric tolerance intervals. A basic design-based strategy like Simple Random Sampling is shown to require smaller sample sizes than the model-based strategy advocated by Barnes. In addition, Simple Random Sampling is completely robust against model errors and less complicated. International Association for Mathematical Geology, 1992 nonparametric tolerance interval nationallicence design-based sampling nationallicence model-based sampling nationallicence spatial dependence nationallicence sampling strategy nationallicence de Gruijter J. The Winand Staring Centre for Integrated Land, Soil and Water Research, P.O. Box 125, 6700 AC, Wageningen, The Netherlands aut ter Braak C. Agricultural Mathematics Group, P.O. Box 100, 6700 AC, Wageningen, The Netherlands aut Mathematical Geology Kluwer Academic Publishers-Plenum Publishers 24/7(1992-10-01), 859-864 0882-8121 24:7<859 1992 24 11004 https://doi.org/10.1007/BF00890707 text/html Onlinezugriff via DOI 1 review-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00890707 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- de Gruijter J. The Winand Staring Centre for Integrated Land, Soil and Water Research, P.O. Box 125, 6700 AC, Wageningen, The Netherlands aut NATIONALLICENCE 700 1- ter Braak C. Agricultural Mathematics Group, P.O. Box 100, 6700 AC, Wageningen, The Netherlands aut NATIONALLICENCE 773 0- Mathematical Geology Kluwer Academic Publishers-Plenum Publishers 24/7(1992-10-01), 859-864 0882-8121 24:7<859 1992 24 11004 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer