Titre du document / Document title
Optimizing inverse distance weighted interpolation with cross-validation
Auteur(s) / Author(s)
MUELLER T. G. (1) ;
DHANIKONDA S. R. K. (2) ;
PUSULURI N. B. (2) ;
KARATHANASIS A. D. (1) ;
MATHIAS K. K. (2) ;
MIJATOVIC B. (1) ;
SEARS B. G. (1) ;
Affiliation(s) du ou des auteurs / Author(s) Affiliation(s)
(1) Department of Agronomy, University of Kentucky, N-122 Ag. Science North, Lexington, KY 40546-0091, ETATS-UNIS
(2) Department of Computer Science, 773 Anderson Hall, University of Kentucky, Lexington, KY 40506-0046, ETATS-UNIS
Résumé / Abstract
Inverse distance weighted interpolation can be easily optimized with commercially available software by selecting distance exponent values that minimize cross-validation (V
CROSS) errors of prediction. The effectiveness of this approach has not been critically evaluated but is of concern because of known limitations of the V
CROSS procedure. To evaluate this optimization procedure, it should be validated with an independent data set (V
IDS). The objectives of this study were (1) to develop and test an optimization procedure based on V
CROSS and V
IDS analyses, (2) to test the accuracy of optimization of the V
CROSS procedure, and (3) to evaluate the quality of maps created with V
CROSS. Soil fertility and bulk soil electrical conductivity data from two previously published studies were used for the analyses. These included prediction and validation data sets for multiple locations. Our optimization procedure compared well with those obtained with a commercially available software program. The use of V
CROSS resulted in overprediction of optimal distance exponent values and a substantial reduction in map quality. In many cases, the maps produced with V
CROSS optimization were blocky and unrealistic. The V
CROSS procedure should not be used to optimize distance exponent values for data collected on regular grids or along transects. Instead, distance exponent values between 1.5 and 2.0 should be used. Software developers should consider creating a V
IDS optimizing procedure.
Revue / Journal Title
Soil science
ISSN
0038-075X
CODEN SOSCAK
Source / Source
2005, vol. 170, n
o7, pp. 504-515 [12 page(s) (article)] (15 ref.)
Langue / Language
Anglais
Editeur / Publisher
Lippincott Williams & Wilkins, Hagerstown, MD, ETATS-UNIS
(1916)
(Revue)
Mots-clés anglais / English Keywords
;
;
;
;
;
;
;
;
;
;
;
;
;
;
;
;
;
;
;
;
Mots-clés français / French Keywords
;
;
;
;
;
;
;
;
;
;
;
;
;
;
;
;
;
;
;
;
Mots-clés espagnols / Spanish Keywords
;
;
;
;
;
;
;
;
;
;
;
;
;
;
;
;
;
;
Mots-clés d'auteur / Author Keywords
;
;
;
Localisation / Location
INIST-CNRS, Cote INIST : 589, 35400013212858.0030
Nº notice refdoc (ud4) : 17090338
