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| Καθολική Χωρική Αυτοσυσχέτιση× | Geary's C× | |
|---|---|---|
| Πεδίο | Χωρική Ανάλυση | Χωρική Ανάλυση |
| Οικογένεια | Regression model | Regression model |
| Έτος προέλευσης≠ | 1950 | 1954 |
| Δημιουργός≠ | P. A. P. Moran (Moran's I, 1950); generalized by Luc Anselin | Roy C. Geary |
| Τύπος≠ | Spatial statistic / hypothesis test | Spatial autocorrelation statistic |
| Θεμελιώδης πηγή≠ | Moran, P. A. P. (1950). Notes on continuous stochastic phenomena. Biometrika, 37(1/2), 17–23. DOI ↗ | Geary, R. C. (1954). The Contiguity Ratio and Statistical Mapping. The Incorporated Statistician, 5(3), 115–145. link ↗ |
| Εναλλακτικές ονομασίες | global spatial dependence, global Moran's I, GSA, global spatial clustering measure | Geary contiguity ratio, Geary C statistic, spatial contiguity ratio, Geary's c |
| Συναφείς≠ | 6 | 4 |
| Σύνοψη≠ | Global Spatial Autocorrelation measures the degree to which similar values cluster together across an entire study area. Rather than identifying where clusters occur, it yields a single summary statistic — most commonly Moran's I — that quantifies whether spatial proximity coincides with value similarity, dissimilarity, or randomness across all observations simultaneously. | Geary's C is a global spatial autocorrelation statistic that measures whether nearby areal units share similar attribute values. Unlike Moran's I, it focuses on squared differences between adjacent pairs rather than cross-products of deviations from the mean, making it more sensitive to local dissimilarity and less influenced by global trends. |
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