topic Re: Optimized Hot Spot Analysis in Spatial Statistics Questions

Optimized Hot Spot Analysis

DevinUnderwood2 — Wed, 20 Dec 2017 16:44:13 GMT

I keep getting a cell size of 57 feet which is automatically set.

I want to manually set the cell size of the generated fishnet polygons around the points.

I tried the environment settings XY Resolution Tolerance but the tool ignores my input.

How can I get this to work or is there another way ?

Thank you

Re: Optimized Hot Spot Analysis

DanPatterson_Retired — Wed, 20 Dec 2017 17:00:30 GMT

In Pro there is an option to set the cell size within the tool

http://pro.arcgis.com/en/pro-app/tool-reference/spatial-statistics/optimized-hot-spot-analysis.htm

The computed settings used to produce optimal hot spot analysis results are reported as messages during tool execution. The associated workflows and algorithms are explained in How Optimized Hot Spot Analysis works.

instead of letting the tool choose optimal defaults for grid cell size and scale of analysis, the Override Settings can be used to set the Cell Size or Distance Band for the analysis.

And further information can be found here.

http://pro.arcgis.com/en/pro-app/tool-reference/spatial-statistics/how-optimized-hot-spot-analysis-works.htm

Re: Optimized Hot Spot Analysis

DanPatterson_Retired — Wed, 20 Dec 2017 17:09:49 GMT

in picture form

Re: Optimized Hot Spot Analysis

DevinUnderwood2 — Wed, 20 Dec 2017 17:17:32 GMT

Great advice, I don't have access to Pro yet.

Would have been real easy to use this setting.

I have looked at the correlated documentation and have not come across a solution.

This Optimized Hot Spot Analysis is convenient also since it gives me counts per polygon

My alternative requires several steps.

Point density (raster)

Change raster (float to integer)

Raster to polygon

Spatial Join to get counts (Requires cleaning up or ensuring all point density output have 100 foot squares.

Re: Optimized Hot Spot Analysis

DanPatterson_Retired — Wed, 20 Dec 2017 17:23:35 GMT

check it out in ArcMap... I not sure what the problem is, since the cell size option is present in both incarnations except Map has the pictures and Pro doesn't

Re: Optimized Hot Spot Analysis

DevinUnderwood2 — Wed, 20 Dec 2017 17:40:12 GMT

ArcMap doesn't have override settings.

Re: Optimized Hot Spot Analysis

DanPatterson_Retired — Wed, 20 Dec 2017 18:45:51 GMT

The second link was arcmap 10.5.1... you must be using an older (as yet unspecified) version, in which case, just use the Hot Spot analysis as indicated in the help topic.

Per