topic Hot Spot Analysis with Partitioned or Data with Breaks in ArcGIS Spatial Analyst Questions

Hot Spot Analysis with Partitioned or Data with Breaks

LarryGaudieri — Tue, 15 Oct 2013 15:22:07 GMT

Hi,

I have a large data-set consisting of ±70K incidents. The scale is county-wide minus municipal limits (which creates breaks or holes through the data).

My question is: has anyone had this experience using the tool? If so, what is the approach? Should I partition or segment the analysis or is the tool intelligent enough to account for large areas without data?

Thanks for any help,

Re: Hot Spot Analysis with Partitioned or Data with Breaks

XanderBakker — Wed, 16 Oct 2013 06:31:33 GMT

Hi Larry,

The (optimized) Hot spot analysis does not account for large areas without data. It is not an interpolation, but a statistical analysis of the number of incidents. If there are no incidents, clustering will be low, which will not result in a hot spot.

Some reading:
How Optimized Hot Spot Analysis Works
How Hot Spot Analysis (Getis-Ord Gi*) works

Kind regards,

Xander

Re: Hot Spot Analysis with Partitioned or Data with Breaks

LarryGaudieri — Wed, 16 Oct 2013 18:31:31 GMT

Thanks Xander,

Should have mentioned that I was still using 10.1

I did some looking and experimented with the interpolation tools and they accommodate breaks and voids but I'm still trying to understand the pattern of the result. I'll keep poking it...

Thanks again