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Complex Region Spatial Smoother (CReSS)

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Abstract

Conventional smoothing over complicated coastal and island regions may result in errors across boundaries, due to the use of Euclidean distances to represent inter-point similarity. The new Complex Region Spatial Smoother (CReSS) method presented here, uses estimated geodesic distances, model averaging and a local radial basis function to provide improved smoothing over complex domains. CReSS is compared, via simulation, to recent related smoothing techniques, Thin Plate Splines (TPS, Harder and Desmarais, 1972), geodesic low rank TPS [Wang and Ranalli, 2007] and the Soap film smoother [Wood et al., 2008]. The GLTPS method cannot be used in areas with islands and SOAP can be hard to parameterize. CReSS is comparable with, if not better than, all considered methods on a range of simulations. Supplementary materials for this article are available online.
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Original languageEnglish
Pages (from-to)340-360
JournalJournal of Computational and Graphical Statistics
Volume23
Issue number2
DOIs
Publication statusPublished - 28 Apr 2014

    Research areas

  • Geodesic Distance, Local Radial Basis, Thin Plate Splines, Model Averaging

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