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	Global Getis-Ord Gi* 統計量	ホットスポット分析 (Getis-Ord Gi*)
分野	空間分析	空間分析
系統	Regression model	Regression model
提唱年	1992	1992
提唱者	Arthur Getis and J. Keith Ord	Arthur Getis and J. Keith Ord
種類	Global spatial clustering statistic	Local spatial statistic
原典	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.
別名	Global G statistic, Getis-Ord General G, General G*, Global spatial clustering statistic	Getis-Ord Gi* statistic, spatial hot spot detection, cluster and outlier analysis, HSA
関連	5	5
概要	The Global Getis-Ord Gi* statistic measures the overall degree of spatial clustering of high or low values across an entire study region. It answers whether the study area, taken as a whole, exhibits significant concentration of high values (hot clustering) or low values (cold clustering), returning a single summary Z-score for the entire dataset.	Hot Spot Analysis uses the Getis-Ord Gi* local spatial statistic to identify geographic locations where high or low attribute values cluster together to a degree that is statistically significant. Each feature is evaluated in relation to its neighbours, producing a z-score that flags genuine spatial hot spots and cold spots against a background of random variation.