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	Robust Geary's C	Moran's I – Globalt rumsligt autokorrelationsindex
Ämnesområde	Rumslig analys	Rumslig analys
Familj	Regression model	Regression model
Ursprungsår	1954 (base); robust variants: 1990s–2000s	1950
Upphovsperson	Geary (1954); robust extensions by Anselin and spatial statisticians	Patrick A. P. Moran
Typ	Robust spatial autocorrelation statistic	Spatial autocorrelation statistic
Ursprungskälla	Geary, R. C. (1954). The contiguity ratio and statistical mapping. The Incorporated Statistician, 5(3), 115–145.	Moran, P. A. P. (1950). Notes on continuous stochastic phenomena. Biometrika, 37(1/2), 17–23.
Alias	robust Geary contiguity ratio, outlier-resistant Geary's C, robust spatial contiguity statistic, robust Geary C	Moran's I statistic, global Moran's I, spatial autocorrelation index, Moran index
Närliggande	6	6
Sammanfattning	Robust Geary's C adapts the classical Geary contiguity ratio — a measure of spatial autocorrelation based on pairwise squared differences between neighbouring locations — to resist distortion by spatial outliers and influential observations. It retains the local sensitivity of Geary's C while producing more reliable inferences when the spatial data contain extreme values or non-normal distributions.	Moran's I is the standard global statistic for detecting spatial autocorrelation: whether nearby locations tend to share similar values. The index ranges from approximately −1 (perfect dispersion) through 0 (spatial randomness) to +1 (perfect clustering), allowing researchers to test whether a geographic pattern differs from complete spatial randomness with a single, interpretable number.