השוואת שיטות

	מדד Geary's C רובסטי	מדד C המקומי של גרי (Local Geary's C)
תחום	ניתוח מרחבי	ניתוח מרחבי
משפחה	Regression model	Regression model
שנת המקור	1954 (base); robust variants: 1990s–2000s	1995
הוגה השיטה	Geary (1954); robust extensions by Anselin and spatial statisticians	Luc Anselin
סוג	Robust spatial autocorrelation statistic	Local spatial statistic
מקור מכונן	Geary, R. C. (1954). The contiguity ratio and statistical mapping. The Incorporated Statistician, 5(3), 115–145.	Anselin, L. (1995). Local indicators of spatial association — LISA. Geographical Analysis, 27(2), 93–115.
כינויים	robust Geary contiguity ratio, outlier-resistant Geary's C, robust spatial contiguity statistic, robust Geary C	Local Geary, local spatial contiguity ratio, LISA Geary, local c statistic
קשורות	6	6
תקציר	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.	Local Geary's C is a local indicator of spatial association (LISA) that measures, for each location, how dissimilar its value is from its immediate neighbours. Unlike Local Moran's I, which detects clustering of similar values, Local Geary's C focuses on squared value differences and is especially sensitive to local spatial outliers and local heterogeneity.