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Arcade - Intersecting Polygons - return multiple answers if multiple.

TrishaSchlake

Hi Xander Bakker

I have a parcel feature layer and a soils feature layer in my webmap. I'm trying to apply the arcade to my parcels layer so that when a parcel is clicked it will give me the corresponding soils to that parcel. The issue is that there could be more than one soil per parcel. The expression I currently have applied to my parcel feature class is this:

var intersectLayer = Intersects(FeatureSetByName($map,"STATSGO2Soils"), $feature)
for(var f in intersectLayer){
return f.muname
}

But it will only return one of my soils into the parcel and will not bring in multiple soils names. Is there a way to do what I'm hoping to do?

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Accepted answers

kenbuja

Try this instead.

<SPAN class="keyword token">var</SPAN> intersectLayer <SPAN class="operator token">=</SPAN> <SPAN class="token function">Intersects</SPAN><SPAN class="punctuation token">(</SPAN><SPAN class="token function">FeatureSetByName</SPAN><SPAN class="punctuation token">(</SPAN>$map<SPAN class="punctuation token">,</SPAN><SPAN class="string token">"STATSGO2Soils"</SPAN><SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">,</SPAN> $feature<SPAN class="punctuation token">)</SPAN>
<SPAN class="keyword token">var</SPAN> results <SPAN class="operator token">=</SPAN> <SPAN class="string token">""</SPAN><SPAN class="punctuation token">;</SPAN>
<SPAN class="keyword token">for</SPAN><SPAN class="punctuation token">(</SPAN><SPAN class="keyword token">var</SPAN> f <SPAN class="keyword token">in</SPAN> intersectLayer<SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">{</SPAN>
  <SPAN class="keyword token">if</SPAN> <SPAN class="punctuation token">(</SPAN>results <SPAN class="operator token">==</SPAN> <SPAN class="string token">""</SPAN><SPAN class="punctuation token">)</SPAN> <SPAN class="punctuation token">{</SPAN>
    results <SPAN class="operator token">=</SPAN> f<SPAN class="punctuation token">.</SPAN>muname<SPAN class="punctuation token">;</SPAN>
  <SPAN class="punctuation token">}</SPAN> <SPAN class="keyword token">else</SPAN> <SPAN class="punctuation token">{</SPAN>
    results <SPAN class="operator token">+</SPAN><SPAN class="operator token">=</SPAN> <SPAN class="string token">", "</SPAN> <SPAN class="operator token">+</SPAN> f<SPAN class="punctuation token">.</SPAN>muname<SPAN class="punctuation token">;</SPAN>
  <SPAN class="punctuation token">}</SPAN>
<SPAN class="punctuation token">}</SPAN>
<SPAN class="keyword token">return</SPAN> results<SPAN class="punctuation token">;</SPAN>‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍<SPAN class="line-numbers-rows"><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN></SPAN>

This would be another way

var intersectLayer = Intersects(FeatureSetByName($map,"STATSGO2Soils"), $feature)
var results = [];
for(var f in intersectLayer){
  results[Count(results)] = f.muname;
}
return Concatenate(results, ", ");‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍<SPAN class="line-numbers-rows"><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN></SPAN>

All comments

kenbuja

Try this instead.

<SPAN class="keyword token">var</SPAN> intersectLayer <SPAN class="operator token">=</SPAN> <SPAN class="token function">Intersects</SPAN><SPAN class="punctuation token">(</SPAN><SPAN class="token function">FeatureSetByName</SPAN><SPAN class="punctuation token">(</SPAN>$map<SPAN class="punctuation token">,</SPAN><SPAN class="string token">"STATSGO2Soils"</SPAN><SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">,</SPAN> $feature<SPAN class="punctuation token">)</SPAN>
<SPAN class="keyword token">var</SPAN> results <SPAN class="operator token">=</SPAN> <SPAN class="string token">""</SPAN><SPAN class="punctuation token">;</SPAN>
<SPAN class="keyword token">for</SPAN><SPAN class="punctuation token">(</SPAN><SPAN class="keyword token">var</SPAN> f <SPAN class="keyword token">in</SPAN> intersectLayer<SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">{</SPAN>
  <SPAN class="keyword token">if</SPAN> <SPAN class="punctuation token">(</SPAN>results <SPAN class="operator token">==</SPAN> <SPAN class="string token">""</SPAN><SPAN class="punctuation token">)</SPAN> <SPAN class="punctuation token">{</SPAN>
    results <SPAN class="operator token">=</SPAN> f<SPAN class="punctuation token">.</SPAN>muname<SPAN class="punctuation token">;</SPAN>
  <SPAN class="punctuation token">}</SPAN> <SPAN class="keyword token">else</SPAN> <SPAN class="punctuation token">{</SPAN>
    results <SPAN class="operator token">+</SPAN><SPAN class="operator token">=</SPAN> <SPAN class="string token">", "</SPAN> <SPAN class="operator token">+</SPAN> f<SPAN class="punctuation token">.</SPAN>muname<SPAN class="punctuation token">;</SPAN>
  <SPAN class="punctuation token">}</SPAN>
<SPAN class="punctuation token">}</SPAN>
<SPAN class="keyword token">return</SPAN> results<SPAN class="punctuation token">;</SPAN>‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍<SPAN class="line-numbers-rows"><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN></SPAN>

This would be another way

var intersectLayer = Intersects(FeatureSetByName($map,"STATSGO2Soils"), $feature)
var results = [];
for(var f in intersectLayer){
  results[Count(results)] = f.muname;
}
return Concatenate(results, ", ");‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍<SPAN class="line-numbers-rows"><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN></SPAN>

TrishaSchlake

Thank you Ken! That is exactly what I needed. I appreciate the quick help!

kenbuja

Glad to help (and check out the alternate code).

Please don't forget to mark the question as answered.

amarcz_cc

@KenBuja

This is a very helpful code, but I am wondering is there a way to add a -1ft buffer or something? I am getting all polygons that share a border with the parcel but are not necessarily in the parcel.

Also would it be possible to add an OrderBy ASC to the script?

kenbuja

You can use additional chaining to add those extra functions to get the intersect layer

var intersectLayer = OrderBy(
  Intersects(
    Buffer(
      FeatureSetByName(
        $map,
        "STATSGO2Soils"
      ),
      -1, 
      'feet'
    ), 
    $feature
  ),
 'Muname DESC'
);

amarcz_cc

Thanks for coming back to this Ken!

amarcz_cc

Hey Ken, sorry to come back, I am attempting to utilize this section in the above script using my own values but am getting the following error:

Invalid Expression. Error on line 19. Identifier expected.

var intersectLayer = OrderBy(
  Intersects(
    Buffer(
      FeatureSetByName(
        $map,
        "STATSGO2Soils"
      ),
      -1, 
      'feet'
    ), 
    $feature
  ),
 'Muname DESC'
);
var results = [];
for(var f in intersectLayer){
  results[Count(results)] = f.muname;
}
return Concatenate(results, ", ");‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍

Any advice?

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