เปรียบเทียบวิธี

	Global Co-Kriging	Universal Kriging (Kriging ที่มีแนวโน้ม)
สาขาวิชา	การวิเคราะห์เชิงพื้นที่	การวิเคราะห์เชิงพื้นที่
ตระกูล	Regression model	Regression model
ปีกำเนิด	1982	1969
ผู้ริเริ่ม	Matheron (geostatistics framework); formalized for multivariate case by Myers (1982)	Georges Matheron
ประเภท	Multivariate geostatistical interpolation	Geostatistical interpolation with spatial trend
แหล่งต้นตำรับ	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.
ชื่อเรียกอื่น	global cokriging, co-kriging, cokriging, multivariate kriging	kriging with a trend, kriging with drift, trend kriging, evrensel kriging
ที่เกี่ยวข้อง	4	3
สรุป	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.