Compara mètodes

	Kriging Universal Global	Kriging Universal Local
Camp	Anàlisi espacial	Anàlisi espacial
Família	Regression model	Regression model
Any d'origen	1969	1969/1997
Autor original	Georges Matheron	Matheron, G. (trend/drift kriging); local neighborhood approach standard in geostatistical practice
Tipus	Geostatistical interpolation	Spatial interpolation model
Font seminal	Journel, A. G., & Huijbregts, C. J. (1978). Mining Geostatistics. Academic Press, London. ISBN: 978-0123910608	Goovaerts, P. (1997). Geostatistics for Natural Resources Evaluation. Oxford University Press. ISBN: 9780195115383
Àlies	universal kriging (global), global UK, kriging with external drift (global), global trend kriging	local UK, local kriging with trend, local KED, local kriging with external drift
Relacionats	4	5
Resum	Global Universal Kriging is a geostatistical interpolation method that models a spatially varying trend (drift) as a deterministic function of coordinates and uses the entire dataset to fit both the trend coefficients and the residual variogram simultaneously. It produces optimal linear unbiased predictions together with pointwise estimation uncertainty, accounting for a large-scale spatial gradient across the full study region.	Local Universal Kriging is a geostatistical interpolation method that combines a spatially varying deterministic trend with a stochastic residual, estimated using only nearby observations within a defined search neighborhood. It generalizes local ordinary kriging by explicitly modeling and removing a polynomial or covariate-driven drift before interpolating the residual surface.