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May 08, 2009


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The GiZScore is the Z-Score from the Gi* test for spatial clusters. The Gi* (aka the GI star, see Ord, J.K., and A. Getis. 1995. Local Spatial Autocorrelation Statistics: Distributional Issues and an Application. Geographical Analysis 27(4): 286-306) Z-Scores define clusters of neighbors with more in common to adjacent neighbors than less; a cluster map. In terms of statistical analysis, this means you neighbor has more in common than less, and so as the bandwidth (distance from one neighbor to the next) increases, the relationship decreases.

No metric is prefect if a human defines it, and that is the beauty of science.

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