השוואת שיטות
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| אוטוקורלציה מרחבית× | ניתוח נקודות חמות (Local Getis-Ord Gi*)× | |
|---|---|---|
| תחום | ניתוח מרחבי | ניתוח מרחבי |
| משפחה | Regression model | Regression model |
| שנת המקור≠ | 1950 | 1992–1995 |
| הוגה השיטה≠ | P. A. P. Moran (global measure, 1950); Roy Geary (Geary's C, 1954); Luc Anselin (LISA, 1995) | Arthur Getis and J. Keith Ord |
| סוג≠ | Spatial statistic / exploratory spatial data analysis | Local spatial association statistic |
| מקור מכונן≠ | Moran, P. A. P. (1950). Notes on continuous stochastic phenomena. Biometrika, 37(1/2), 17–23. DOI ↗ | Getis, A., & Ord, J. K. (1992). The analysis of spatial association by use of distance statistics. Geographical Analysis, 24(3), 189–206. DOI ↗ |
| כינויים | spatial dependence, geographic autocorrelation, spatial clustering measure, SA | Gi* statistic, Getis-Ord Gi*, local G-star, hot spot statistic |
| קשורות | 5 | 5 |
| תקציר≠ | Spatial autocorrelation quantifies the degree to which a variable's values at nearby locations resemble each other more (positive autocorrelation) or less (negative autocorrelation) than expected by chance. Global indices such as Moran's I summarise the pattern across the entire study area, while local variants reveal clusters and outliers at the level of individual observations. | The Local Getis-Ord Gi* statistic identifies statistically significant spatial clusters of high values (hot spots) and low values (cold spots) within a study area. Unlike global measures, it produces a z-score for every location, revealing where concentrated clustering occurs and with what statistical confidence. |
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