Comparer des méthodes

	Analyse de points chauds Getis-Ord Gi*	C de Geary (mesure globale d'autocorrélation spatiale)
Domaine	Analyse spatiale	Analyse spatiale
Famille	Regression model	Hypothesis test
Année d'origine	1992	1954
Auteur d'origine	Arthur Getis and J. Keith Ord	Roy C. Geary
Type	Local spatial statistic	Global spatial autocorrelation statistic
Source fondatrice	Getis, A. & Ord, J.K. (1992). The Analysis of Spatial Association by Use of Distance Statistics. Geographical Analysis, 24(3), 189–206.	Geary, R. C. (1954). The contiguity ratio and statistical mapping. The Incorporated Statistician, 5(3), 115–146.
Alias	hot spot analysis, cold spot analysis, Gi* statistic, local Gi statistic	Geary contiguity ratio, Geary's contiguity ratio, global spatial autocorrelation, Geary C mekânsal otokorelasyon
Apparentées	4	2
Résumé	Getis-Ord Gi* is a local spatial statistic, introduced by Getis and Ord in 1992 and refined in 1995, that compares the value at each location and its neighbours against the global mean to identify statistically significant clusters of high values (hot spots) and low values (cold spots).	Geary's C is a global measure of spatial autocorrelation — whether nearby locations tend to have similar values — introduced by Roy Geary in 1954. Unlike Moran's I, which is built on the covariation of values around the mean, Geary's C is built on the squared differences between neighbouring values, making it more sensitive to local, short-range variation. Values below 1 indicate positive spatial autocorrelation (similar neighbours), near 1 indicate randomness, and above 1 indicate negative autocorrelation.