I am using ArcGIS Pro.

I am trying to return a string if the attribute of another feature is the same as the current one in Arcade:

    var hazardidpt = FeatureSetByName($datastore, "Hazard Point", ["HazardID"])
    var siteidpt = FeatureSetByName($datastore, "Hazard Point", ["SiteID"])
    var hazardtypept = FeatureSetByName($datastore, "Hazard Point")

   if (($feature["HazardID"] == hazardidpt) && ($feature["SiteID"] == siteidpt ) ){
     return 'test' } 

It doesn't seem to work

  • 2
    'Doesn't work' or 'Doesn't seem to work'? What is the expected result? What is the actual result?
    – Berend
    Oct 22, 2021 at 9:58
  • It doesn't work. If the hazard ID equals hazard ID in the point feature and site ID are the same, return hazard type field from the point into the polygon
    – lloyd
    Oct 22, 2021 at 10:13
  • 1
    You're comparing an attribute value from $feature with a FeatureSet (i.e. a collection of features). How would that work?
    – Berend
    Oct 22, 2021 at 10:29
  • @Berend do you know how I might make it work?
    – lloyd
    Oct 22, 2021 at 10:38
  • 2
    No, it's not clear from your question how you want it to work and what your data looks like. Please explain what another feature would be. And don't put it in a comment, but edit the question so others don't need to go over the comments to understand what's going on. (BTW I'm not very familiar with Arcade, so I don't think I can help you out. I'm just trying to point out why the question is not answerable right now, and how you could improve it)
    – Berend
    Oct 22, 2021 at 10:44

1 Answer 1


@lloyd, it's time for you to read the help file and understand what it is telling you. The function FeatureSetByName() clearly states it returns a FeatureSet.

Read that and you discover that this is a set of Features, keyword being "set" which is a type of collection object. Now you understand that the IF statement you have created makes no sense

If ($feature["HazardID"] == hazardidpt).....

equates to

If a hazard ID value = a collection object then do something

Your collection object could have thousands of rows, so which row are you wanting to test against...

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