Hot-spot analysis Using Getis-Ord Gi Statistic (ArcGIS Pro)

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Hot-spot analysis of median income using census block-group-level data and Getis-Ord Gi* statistic  (ArcGIS Pro)

The Getis-Ord hot spot analysis shows where high and low values are clustered. The tool compares the values of each feature with the neighboring features within a user specified distance. The values for each feature are then color coded to show high and low value clusters. The Gi statistic, also called Gi*, used both the location and the value in the pattern calculations. This is used to see the effect of the value field on the clustering over the user specified distance. The distance is determined by the characteristics of the input dataset. Features representing large, wide groupings may use a larger distance band value, while features representing a local region or smaller feature areas might use a small distance band value. With a larger value, expect to get a few large clusters. A smaller distance value may result in more numerous, smaller clusters.


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