Σύγκριση μεθόδων

	Στιβαρό Στατιστικό Στοιχείο Gi* Getis-Ord	Τοπική Ανάλυση Gi* Getis-Ord (Ανάλυση Θερμών Σημείων)
Πεδίο	Χωρική Ανάλυση	Χωρική Ανάλυση
Οικογένεια	Regression model	Regression model
Έτος προέλευσης	1992 (base); robust variants circa 2000s–2010s	1992–1995
Δημιουργός	Getis & Ord (base statistic); robust extensions developed in subsequent spatial statistics literature	Arthur Getis and J. Keith Ord
Τύπος	Local spatial statistic	Local spatial association statistic
Θεμελιώδης πηγή	Getis, A., & Ord, J. K. (1992). The analysis of spatial association by use of distance statistics. Geographical Analysis, 24(3), 189–206.	Getis, A., & Ord, J. K. (1992). The analysis of spatial association by use of distance statistics. Geographical Analysis, 24(3), 189–206.
Εναλλακτικές ονομασίες	Robust Gi*, Robust local Gi star, outlier-resistant hot spot analysis, robust local spatial autocorrelation Gi*	Gi* statistic, Getis-Ord Gi*, local G-star, hot spot statistic
Συναφείς	5	5
Σύνοψη	The Robust Getis-Ord Gi* statistic extends the classical Gi* hot-spot measure to handle outliers in spatial data. By using robust estimators of the mean and variance — such as trimmed means, medians, or down-weighted influential observations — it identifies statistically significant spatial clusters of high or low values even when the attribute distribution contains extreme values that would distort the standard Gi*.	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.