Arcade Expression to Summarize Features

Anonymous User

Within ArcGIS Online, I want to symbolize a feature layer by a count of the district values within a single field but I'm not sure how to do that. 

For background I have a zip code polygon layer that has a table join (one to many) with a feature layer connected to a survey123. One of the prompts in the survey collects the zip code. As the survey responses come in the polygon layer is populated with the prompts. I want to symbolize that polygon layer by the frequency of each zip code occurrence in the attribute table.

For example, if 19123 appears 5 times in the table, the zip code polygon layer would reflect the value 5 and not the zip code itself.

JasonGlidewell

Yes, you'll need to populate the "Extra Field" with the count.

The easiest way to do this I can think of, would be to use a filter.  It's a pretty simply command in Arcade, and can be used in a field calculate.  However, again, limitaitons apply.  Using Arcade in a field calcualte requires editor tracking to be disabled.

Something like this...

var zip = $feature.Zip_Code
var sql1 = "Zip_Code == @zip"
var filter1 = Filter($layer,sql1)
var count1 = Count(filter1)

return count1

I am normally a "question asker" not a "question answerer" so please forgive me if my answers are unclear.  Tyring to give back to this community after receiving so much help over the years.