topic Re: Summarise Within: Strange results in Geoprocessing Questions

Summarise Within: Strange results

JackSilburn — Mon, 12 Nov 2018 02:36:41 GMT

I'm not sure if I'm misusing this tool, but when I run it I'm getting an outcome which seems contrary to my understanding of the tool.

Basically, I'm trying to summarise a point layer within a polygon layer. See screenshot below:

I would expect the result to be polygons with the summarised data of each point, contained within each polygon.

Instead, the summarise within tool is only returning one polygon:

Any insight would be much appreciated. I'm on ArcGIS Pro.

Re: Summarise Within: Strange results

DanPatterson_Retired — Mon, 12 Nov 2018 03:02:45 GMT

If you overlaid the points onto the polygon layer, what other options did you choose? and can you confirm that there is only one record in the table of the resultant output polygon layer?

Re: Summarise Within: Strange results

JackSilburn — Mon, 12 Nov 2018 03:48:08 GMT

Hi Dan. See below config for the tool:

Here's the resultant data:

So you also think I should be getting more than one polygon?

Re: Summarise Within: Strange results

JackSilburn — Mon, 12 Nov 2018 04:10:30 GMT

Follow up:

I've run the tool again with a different point layer, and the outcome is as I expected:

I'm getting multiple polygons with summarised data.

I'll mark as resolved if I don't get any further responses.

Thanks!

Re: Summarise Within: Strange results

DanPatterson_Retired — Mon, 12 Nov 2018 04:14:56 GMT

Is there by chance that you have a multipart polygon?

Open the table for your polygon layer... are there individual records for all those visible polygons? or is there only one record? (ie it is multipart.

The only other way you could have 1 polygon as output is if you havea selected polygon.

because

out_feature_class

The output polygon feature class containing the same geometries and attributes as the input polygons with additional new attributes about the number points, length of lines, and area of polygons inside each input polygon and statistics about those features.

Re: Summarise Within: Strange results

JackSilburn — Mon, 12 Nov 2018 04:59:30 GMT

You could be onto something with the second part, because the process is working as intended now. Maybe I had selected a polygon without realising... Not sure.

Thank you for your help.