Difference: Papers20100623105844 (2 vs. 3)

Revision 32010-08-13 - TheresiaFreska

 
META TOPICPARENT name="AI_GEOSTATSPapers"
Title: Analysis of Rainfall Data by Robust Spatial Statistics using S+ SPATIALSTATS
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Date: 1 May 1998
  Authors: Marc G. Genton & Reinhard Furrer
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Link: fileadmin/Documents/SIC97_GIDA/Genton_2.pdf
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Link: Genton_2.pdf
  Abstract:
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This paper discusses the use of robust geostatistical methods on a data set of rainfall measurements in Switzerland. The variables are detrended via non-parametric estimation penalized with a smoothing parameter. The optimal trend is computed with a smoothing parameter based on cross-validation. Then, the variogram is estimated by a highly robust estimator of scale. The parametric variogram model is fitted by generalized least squares, thus taking account of the variance-covariance structure of the variogram estimates. Comparison of kriging with the initial measurements is completed and yields interesting results. All these computations are done with the software S+SPATIALSTATS, extended with new functions in S+ that are made available.
 REFERENCE

Journal of Geographic Information and Decision Analysis, Vol. 2, No. 2, pp. 116-126, 1998

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Abstract

This paper discusses the use of robust geostatistical methods on a data set of rainfall measurements in Switzerland. The variables are detrended via non-parametric estimation penalized with a smoothing parameter. The optimal trend is computed with a smoothing parameter based on cross-validation. Then, the variogram is estimated by a highly robust estimator of scale. The parametric variogram model is fitted by generalized least squares, thus taking account of the variance-covariance structure of the variogram estimates. Comparison of kriging with the initial measurements is completed and yields interesting results. All these computations are done with the software S+SPATIALSTATS, extended with new functions in S+ that are made available.

 Keywords: Robustness; Trend; Variogram; Generalized least squares; Kriging.
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-- TWikiAdminUser - 2010-06-16
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