topic Re: Density and convert to polygon in Geoprocessing Questions

Density and convert to polygon

jaykapalczynski — Wed, 18 Apr 2018 19:41:25 GMT

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?

AbdullahAnter — Wed, 18 Apr 2018 21:15:13 GMT

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.

DanPatterson_Retired — Wed, 18 Apr 2018 22:13:30 GMT

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

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

jaykapalczynski — Thu, 19 Apr 2018 13:28:07 GMT

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.