TY - BOOK
T1 - Complex Region Spatial Smoother (CReSS)
AU - Scott Hayward, Lindesay Alexandra Sarah
AU - MacKenzie, Monique Lea
AU - Donovan, Carl Robert
AU - Walker, Cameron
AU - Ashe, Erin
N1 - This work is supported with funding from NERC UK
PY - 2011
Y1 - 2011
N2 - 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.
AB - 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.
KW - Geodesic distance
KW - Local radial basis
KW - Thin plate splines
KW - Model averaging
M3 - Other report
T3 - CREEM Technical Report
BT - Complex Region Spatial Smoother (CReSS)
PB - University of St Andrews
ER -