topic Count and summarize points within polygons in ArcGIS Pro Questions

Count and summarize points within polygons

LaurenceSigler — Wed, 19 Jun 2019 15:03:21 GMT

I have one polygon layer (shp) of areas, and a point layer converted from a raster file. The points have categories as they were converted from a raster, which should correspond to the polygon value, however I wish to make a validation table of it.

I want to summarize the values of each point within each polygon as such:

polygon type A

-------------------

number of points type A

number of points type B

polygon type B

--------------------

number of points type A

number of points type B

number of points type C

Spatial join would work?

Thank you very much in advance.

Re: Count and summarize points within polygons

KoryKramer — Wed, 19 Jun 2019 15:20:39 GMT

Have you tried a spatial join and not getting the results you expect?

If you use a spatial join, you then might need to summarize the output to group the number of points by attribute. You could use the Case Field in https://pro.arcgis.com/en/pro-app/tool-reference/analysis/summary-statistics.htm

So instead of doing that, you might want to try Summarize Within and use the Group Field: https://pro.arcgis.com/en/pro-app/tool-reference/analysis/summarize-within.htm

Re: Count and summarize points within polygons

LaurenceSigler — Wed, 19 Jun 2019 15:26:11 GMT

Thanks for the quick reply. I'm not finding these tools in the toolbox, I have Arc Map 10,6. Is it something extra?

Re: Count and summarize points within polygons

KoryKramer — Wed, 19 Jun 2019 16:30:39 GMT

OK, Summarize Within is only in Pro I think.

In ArcMap, you could still do Spatial Join: http://desktop.arcgis.com/en/arcmap/latest/tools/analysis-toolbox/spatial-join.htm

and Summary Statistics: http://desktop.arcgis.com/en/arcmap/latest/tools/analysis-toolbox/summary-statistics.htm

But if you have an ArcGIS Desktop license, you should also have ArcGIS Pro - it is a part of ArcGIS Desktop...

Re: Count and summarize points within polygons

LaurenceSigler — Thu, 20 Jun 2019 14:40:08 GMT

That was what I was looking for, thanks very much for the replies.

slts

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