Hot Spot Analysis Tool / statistically significant isolated areas?

Discussion created by iribaar on Oct 20, 2017
Latest reply on Oct 23, 2017 by Dan_Patterson

On behalf of my colleague who has technical problems to access this forum I would like to ask:

Using the ArcGIS 10.5 Spatial Statistics Tool Hot Spot Analysis (Getis-Ord Gi*) with a data set for agricultural indicators based on 16,000 europaen community areas (polygons) I got Hot and Cold Spots which shows me a certain geographical pattern. To be a statistically significant hot spot, an area have a high value and is surrounded by other areas with high values as well and vice versa for the Cold Spots. But in some cases I got isolated areas which are statistically significant but they are not surrounded by other statistically significant areas with high or low values. What could be the reason for that?