השוואת שיטות

	קריגינג משותף גלובלי	קריגינג אוניברסלי (קריגינג עם מגמה)
תחום	ניתוח מרחבי	ניתוח מרחבי
משפחה	Regression model	Regression model
שנת המקור	1982	1969
הוגה השיטה	Matheron (geostatistics framework); formalized for multivariate case by Myers (1982)	Georges Matheron
סוג	Multivariate geostatistical interpolation	Geostatistical interpolation with spatial trend
מקור מכונן	Myers, D. E. (1982). Matrix formulation of co-kriging. Journal of the International Association for Mathematical Geology, 14(3), 249–257.	Matheron, G. (1963). Principles of geostatistics. Economic Geology, 58(8), 1246–1266.
כינויים	global cokriging, co-kriging, cokriging, multivariate kriging	kriging with a trend, kriging with drift, trend kriging, evrensel kriging
קשורות	4	3
תקציר	Global Co-Kriging is a multivariate geostatistical interpolation method that estimates an unsampled primary variable by exploiting its spatial cross-correlation with one or more secondary variables. Unlike local (moving-window) approaches, it fits a single set of variogram and cross-variogram models to the entire study domain and solves one global cokriging system for each prediction location.	Universal kriging generalizes ordinary kriging to data whose mean varies systematically across space — a spatial trend or 'drift'. It models the mean as a function of the coordinates (or covariates) and krigs the residuals, so it can interpolate variables that drift in a preferred direction, such as temperature falling with latitude or a pollutant gradient, while still returning prediction variances.