topic Re: Return nearest feature within same feature layer using Arcade in ArcGIS JavaScript Maps SDK Questions

Return nearest feature within same feature layer using Arcade

AFackler_NAPSG — Tue, 02 Feb 2021 20:53:54 GMT

I am trying to create an Arcade script that, within the pop-up, will return the next closest feature within the same layer. In my case, if I click on a wildfire point, it will tell me what the next closest wildfire point is. I have has some success changing up the script found in lines 30-44 here, but what I have found is that my current script returns the point that is furthest from the selected point within the search distance. Any guidance on what I can do?

var searchDistance =50; var points = $layer var closestPoint = Intersects(points, BufferGeodetic($feature, searchDistance, "Miles")); var minDistance = Infinity for(var listing in closestPoint){ var facilityDistance = Distance(listing, $feature, "miles"); if (facilityDistance < minDistance){ closestPoint = listing; return closestPoint.iaName } };

Re: Return nearest feature within same feature layer using Arcade

KenBuja — Wed, 03 Feb 2021 13:44:00 GMT

Give this a try

var searchDistance =50; var points = $layer var closestPoints = Intersects(points, BufferGeodetic($feature, searchDistance, "Miles")); var closestPoint; var minDistance = Infinity; for(var listing in closestPoints){ var facilityDistance = Distance(listing, $feature, "miles"); if (facilityDistance < minDistance){ closestPoint = listing; } }; return closestPoint;

Re: Return nearest feature within same feature layer using Arcade

XanderBakker — Wed, 03 Feb 2021 13:48:48 GMT

Hi @AFackler_NAPSG ,

You have to update the minimum distance and as @KenBuja pointed out you have to put the return outside the for loop.

Furthermore, you have to avoid returning the same input feature. You could do this by checking for an ID (I used the iaName in this case.

Re: Return nearest feature within same feature layer using Arcade

AFackler_NAPSG — Wed, 03 Feb 2021 14:06:18 GMT

Thank you @KenBuja and @XanderBakker !