Density and convert to polygon

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04-18-2018 12:41 PM
jaykapalczynski
Frequent Contributor

I have a point file that is spread over the state

I want to create a heat map based on a count field in the point data.

From there I want to create a polygon layer that shows the rings.

What I want is a value associated with the rings themselves...say 1-5 depending on the heat map/ kernel density representation.

I can then use those polygon rings for search/select boundaries

I tried to use Kernel density

I then try to convert to polygon and says invalid GP Type.  I used the int function in tools and it only creates a single record....Very confused..

Any thoughts?

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jaykapalczynski
Frequent Contributor

I figured out a solution that worked for me....don know if this is the only way but it worked and sick of trying...

  • I used Kernel Density and created a Raster
    1. I then classified it to 10 classes
  • I then did a Reclassify on the Raster which actually created a table on the raster.
  • I then was able to go Raster to Polygon directly 
    1. This created all the proper rings based on the reclassified value.

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AbdullahAnter
Regular Contributor II

I can then use those polygon rings for search/select boundaries

I think using Merge rule in Spatial Join saves many steps you want to do.

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DanPatterson_Retired
MVP Esteemed Contributor

Maybe you wanted kernel density to return the expected counts (one of the options)

http://pro.arcgis.com/en/pro-app/tool-reference/spatial-analyst/kernel-density.htm

you can't convert a raster to polygons, you could contour a raster, but you would have limited success getting the contours to polygons

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jaykapalczynski
Frequent Contributor

I figured out a solution that worked for me....don know if this is the only way but it worked and sick of trying...

  • I used Kernel Density and created a Raster
    1. I then classified it to 10 classes
  • I then did a Reclassify on the Raster which actually created a table on the raster.
  • I then was able to go Raster to Polygon directly 
    1. This created all the proper rings based on the reclassified value.