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Title: Complex Region Spatial Smoother (CReSS)
Authors: Scott Hayward, Lindesay Alexandra Sarah
MacKenzie, Monique Lea
Donovan, Carl Robert
Walker, Cameron
Ashe, Erin
Keywords: Geodesic distance
Local radial basis
Thin plate splines
Model averaging
QA Mathematics
Issue Date: 2011
Citation: Scott Hayward , L A S , MacKenzie , M L , Donovan , C R , Walker , C & Ashe , E 2011 , Complex Region Spatial Smoother (CReSS) . CREEM Technical Report , no. 2011-2 , University of St Andrews .
Series/Report no.: CREEM Technical Report
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.
Version: Preprint
Description: This work is supported with funding from NERC UK
Type: Report
Publisher: University of St Andrews
Appears in Collections:Centre for Research into Ecological & Environmental Modelling (CREEM) Technical report series
University of St Andrews Research
Biology Research
Mathematics & Statistics Research
Statistics Research
Centre for Research into Ecological & Environmental Modelling (CREEM) Research
Scottish Oceans Institute Research

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