Arcade script not working (Portal)

mapmakerleah

Hi All,

 

I have an arcade script that I often use to return the closest value to a given point. In this case, an address number. When I try it in this particular instance, I receive "Test execution error: Execution error - Cannot access value using a key of this type. Verify test data."

This is my script. The funny thing is that I copied it from another calculation (in field maps) just to return an ID from a water main. I am not sure why this one isn't working.

var address = FeatureSetByName($map, "Addresses")

var searchDistance = 1

var closestPlace = Intersects(address, Buffer($feature, searchDistance, 'miles'))

var minDistance = Infinity

for (var place in closestPlace){

  var placeDistance = Distance(place, $feature, 'mile');

  if (placeDistance < minDistance){

    minDistance = placeDistance;

    closestPlace = place;

  }

};

return closestPlace.bldg_num

 

thank you!

jcarlson

Where are you running this? Depending on the context, $map may not be available.

The function Intersects returns a FeatureSet. Your expression replaces closestPlace with place if there's a feature found within the buffer, but if there isn't then closestPlace will still be a FeatureSet.

Personally, I would avoid re-using a variable for different types of objects. You might try something like this. By creating a placeholder place with a null value, and by keeping the FeatureSet and the Feature in their own variables, we don't get issues when we try to call the value at the end.

And yes, a dictionary and Feature are different types of objects, I know, but in this case, you can call their attributes in the same way.

var address = FeatureSetByName($map, "Addresses")
var searchDistance = 1
var closePlaces = Intersects(address, Buffer($feature, searchDistance, 'miles'))
var minDistance = Infinity

// create placeholder closest place with a building number
var closestPlace = {'bldg_num':null}

for (var place in closePlaces){
  var placeDistance = Distance(place, $feature, 'mile');
  if (placeDistance < minDistance){
    minDistance = placeDistance;
    closestPlace = place;
  }
};

return closestPlace['bldg_num']