# What is Getis-Ord G?

## What is Getis-Ord G?

The High/Low Clustering (Getis-Ord General G) tool measures the concentration of high or low values for a given study area.

### What is GI statistics?

The Hot Spot Analysis tool calculates the Getis-Ord Gi* statistic (pronounced G-i-star) for each feature in a dataset. The resultant z-scores and p-values tell you where features with either high or low values cluster spatially. This tool works by looking at each feature within the context of neighboring features.

#### What does a hotspot analysis show?

Hotspot analysis is a spatial analysis and mapping technique interested in the identification of clustering of spatial phenomena. These spatial phenomena are depicted as points in a map and refer to locations of events or objects.

What is a cold spot in GIS?

A hot spot is a cluster of high values and a cold spot is a cluster of low values.

What is spatial autocorrelation?

Spatial autocorrelation is the term used to describe the presence of systematic spatial variation in a variable and positive spatial autocorrelation, which is most often encountered in practical situations, is the tendency for areas or sites that are close together to have similar values.

## How do you read hotspot analysis?

What is Hotspot Analysis? indicates a significant hot spot. A low negative Z score and small P value indicates a significant cold spot. The higher (or lower) the Z score, the more intense the clustering.

### How do I use hotspot analysis in Arcgis?

From the Toolbox navigate to Spatial Statistics Tools > Mapping Clusters and open the Optimized Hotspot Analysis tool. This tool allows for quick hotspot analysis using minimal input parameters and sets/calculates default parameters for those you have no control over.

#### What is kernel density Arcgis?

Kernel Density calculates the density of point features around each output raster cell. Conceptually, a smoothly curved surface is fitted over each point.