topic Re: ArcGIS Pro Analysis tool that can select highest value intersecting in ArcGIS Pro Questions

ArcGIS Pro Analysis tool that can select highest value intersecting

CMcDonald — Thu, 27 Mar 2025 15:50:18 GMT

Hello,

I have been asked to overlay our Property Polygons data shown in grey in the attached image and then attach the value contained with the overlaid coloured polygons of Gas. In the example you can see the polygon highlighted in cyan has 3 possible values but I want to take the worst case scenario and select the value contained from the darkest coloured polygon intersecting. The gas polygon layer contains a Class attribute which ranges from 1-6.

Is there a way to do this and what tool would i use please?

I have a Standard licence.

Thankyou.

Re: ArcGIS Pro Analysis tool that can select highest value intersecting

DanPatterson — Thu, 27 Mar 2025 16:06:23 GMT

if both inputs are polygons, then a summarize within using the maximum might work

Summarize Within (Analysis)—ArcGIS Pro | Documentation

Re: ArcGIS Pro Analysis tool that can select highest value intersecting

AustinAverill — Thu, 27 Mar 2025 16:30:58 GMT

The link below is a post that describes how to do exactly what you're looking for using arcade to calculate a new field!

https://community.esri.com/t5/attribute-rules-questions/how-to-generate-largest-overlap-from-polygon-in/td-p/1283562

Re: ArcGIS Pro Analysis tool that can select highest value intersecting

CMcDonald — Mon, 31 Mar 2025 11:59:18 GMT

Thankyou @DanPatterson
I had a go with Summarize Within Tool but the output generated some odd results.

As the coloured Polygons only contain values in a field named CLASS of either 1,2,3,4,5 or 6 I would expect the Maximum statistic to return a whole value.

In quite a few cases I am getting decimal points.

and in the highlighted record above the value should actually be 4.

Unsure if I am missing something?

Thank you

Re: ArcGIS Pro Analysis tool that can select highest value intersecting

DanPatterson — Mon, 31 Mar 2025 13:43:26 GMT

From the help topic

Polygon summary features are summarized using the areal proportions of the input features.

So it has portioned the max based on the areal overlap.

If the inputs were rasters, then a "zonal maximum" would be what you are after.

Re: ArcGIS Pro Analysis tool that can select highest value intersecting

CMcDonald — Mon, 14 Apr 2025 14:16:13 GMT

ESRI UK Support were able to resolve this for me. Thank you!

Use Add Spatial Join