手法を比較

	Global Moran's I	Geary's C
分野	空間分析	空間分析
系統	Regression model	Regression model
提唱年	1950	1954
提唱者	Patrick Alfred Pierce Moran	Roy C. Geary
種類	Global spatial autocorrelation test / index	Spatial autocorrelation statistic
原典	Moran, P. A. P. (1950). Notes on continuous stochastic phenomena. Biometrika, 37(1/2), 17–23.	Geary, R. C. (1954). The Contiguity Ratio and Statistical Mapping. The Incorporated Statistician, 5(3), 115–145.
別名	Moran's I, global spatial autocorrelation index, Moran index, GMI	Geary contiguity ratio, Geary C statistic, spatial contiguity ratio, Geary's c
関連	6	4
概要	Global Moran's I is the most widely used single-number summary of spatial autocorrelation across an entire study area. It compares the attribute value at each location with values at neighbouring locations using a spatial weights matrix, and returns a statistic ranging from −1 (perfect dispersion) through 0 (spatial randomness) to +1 (perfect clustering). A significance test determines whether the observed pattern is stronger than random chance.	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.