topic Re: Arcade Symbology in ArcGIS Online Questions

Arcade Symbology

DarlaPyron — Thu, 27 Jun 2019 15:48:34 GMT

I am trying to display pavement condition inventory scores as groups, for instance 60-75 is okay, 76-89 is good, and 90-99 is excellent. I can do that in Map, but not Online. There is no grouping setting I can find. You can use Counts and Amounts and set the manual breaks, but you can't change individual colors in the ramp. I am not good with Arcade, but I found something that partially works. The problem is it only returns 3 categories. That may be all it is designed to do. Does anyone have any suggestions? Thanks!

if($feature.PCI >=90){

return "Great"

}

if (75<= $feature.PCI <90){

return "Better"

}

if (60<= $feature.PCI <75){

return "Okay"

}

if(40<= $feature.PCI <60){

return "Bad"

}

if($feature.PCI <40){

return "Awful"

}

Re: Arcade Symbology

XanderBakker — Fri, 10 Dec 2021 22:25:08 GMT

Hi dpyron_hv

It is better to use if - else if - else statements. Can you try this:

var PCI = $feature.PCI;

if (PCI < 40) {
    return "Awful";
} else if (PCI < 60) {
    return "Bad";
} else if (PCI < 75) {
    return "Okay";
} else if (PCI < 90) {
    return "Better";
} else {
    return "Great";
}
‍‍‍‍‍‍‍‍‍‍‍‍‍

If your data does not have values in each class, those classes will not be returned by the expression.

Re: Arcade Symbology

DarlaPyron — Fri, 28 Jun 2019 14:40:37 GMT

Thank you Xander, that worked perfectly! I really need to take class in this.

Re: Arcade Symbology

DarlaPyron — Fri, 28 Jun 2019 14:41:41 GMT

Thank you Xander, that worked perfectly!

Re: Arcade Symbology

DarlaPyron — Fri, 28 Jun 2019 14:46:16 GMT

Thank you Xander, that shows exactly what I needed.

Darla

Get Outlook for Android<https://aka.ms/ghei36>

Re: Arcade Symbology

XanderBakker — Fri, 28 Jun 2019 15:34:54 GMT

Hi Darla Pyron

There is really a lot you can do with Arcade expressions and there are a lot of resources available as blog posts:

https://www.esri.com/en-us/search#/?q=Arcade&v=0&tab=Explore&page=1

The official documentation site of Arcade contains a list of all expressions you can use: https://developers.arcgis.com/arcade/function-reference/ and I use the playground a lot to test an expression when I don't have access to the data: https://developers.arcgis.com/arcade/playground/

Also here at GeoNet there are a lot of documents with explanations of different use cases. Just search for Arcade and filter on document or blog post:

https://community.esri.com/search.jspa?q=Arcade&type=post

https://community.esri.com/search.jspa?q=Arcade&type=document

And whenever you have a question, just post it here on GeoNet and tag me. We are here to help.

Re: Arcade Symbology

DanielSalazar1 — Thu, 14 Nov 2019 19:41:25 GMT

Xander I was looking to do something similar to this but it seems as if the IF statement is only catching the first argument in the if statement and ignoring my &&

var Printed = $feature.Printed
var Worked = $feature.Worked
var Entered = $feature.Entered

if (Printed == 'YES' && Worked == 'NO' && Entered == 'NO') {
return "Printed";
} else if (Printed == 'YES' && Worked == 'YES' && Entered == 'NO') {
return "Worked";
} else if (Printed == 'YES' && Worked == 'YES' && Entered == 'YES') {
return "Entered";
} else {
return "Needs Printing";
}

Re: Arcade Symbology

XanderBakker — Fri, 10 Dec 2021 22:25:11 GMT

Hi dansalazar ,

Can you try this?

var Printed = $feature.Printed;
var Worked = $feature.Worked;
var Entered = $feature.Entered;

if (Printed == 'YES') {
    if (Worked == 'NO') {
        if (Entered == 'NO') {
            // YES NO NO
            return "Printed";
        }
    } else {
        if (Entered == 'YES') {
            // YES YES YES
            return "Entered";
        } else {
            // YES YES NO
            return "Worked";
        }
    }
} else {
    return "Needs Printing";
}
‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍

Not sure as to why it would ignore the &&. I have to run some test to find out.

Re: Arcade Symbology

MartijnJansma — Tue, 12 May 2020 10:34:46 GMT

Hi Xander, I tried something similar to Daniel.

I have 3 fields which either contain a number value or don't.

I tried the following code to no avail:

----------

var a = $feature["Ronde1_wk"];

var b = $feature["Ronde2_wk"];

var c = $feature["Ronde3_wk"];

var x = iif( !isEmpty( a ), 1, 0);

var x = iif( !isEmpty( b ), 2, 0);

var x = iif( !isEmpty( c ), 3, 0);

var list = [x,y,z];

return Max( list )

----------

When testing in the arcade module it returns either 0,1,2 or 3 like you would expect.

When I am to apply set expression the module only returns 0 and 1.

I tried applying your aforementioned cascaded if statement but i had no succes.

I had no succes with DefaultValue instead of isEmpty either (making the if statement (a > 0))

Is there somehting I'm missing?

Re: Arcade Symbology

XanderBakker — Fri, 10 Dec 2021 22:25:14 GMT

Hi Martijn Jansma ,

I am a bit curious to know what kind of data you are storing in the fields (and what world championship it refers to ). The logic should work although in the expression you shared assigns 3 times a value to variable x (when it should be x, y and z). I am sure that you have that in your original code, since otherwise the code would not run at all.

It would be interesting to validate the data the gets retrieved and processed. Could you try the code below and report back what is written to the console?

var a = $feature["Ronde1_wk"];
var b = $feature["Ronde2_wk"];
var c = $feature["Ronde3_wk"];
var data = [a, b, c];
Console(data);

var x = iif(!isEmpty(a), 1, 0);
var y = iif(!isEmpty(b), 2, 0);
var z = iif(!isEmpty(c), 3, 0);
var list = [x,y,z];
Console(list);

return Max(list);‍‍‍‍‍‍‍‍‍‍‍‍‍

Re: Arcade Symbology

MartijnJansma — Fri, 15 May 2020 10:10:11 GMT

Hey Xander,

Data stored is WeekNumber as Integer.

Applying your lines of code can gives me either of 4 answers.

[19,null,null]

[1,0,0]

[19,20,null]

[1,2,0]

[19,20,30]

[1,2,3]

[null,null,null]

[0,0,0]

Results return either 0, 1, 2, 3 as integer.

Symbology returns values 0 and 1.

Re: Arcade Symbology

XanderBakker — Fri, 15 May 2020 13:18:16 GMT

Hi martijn.jansma_BTL ,

The results are as expected:

Case	data	list	Max(list)
1	[19,null,null]	[1,0,0]	1
2	[19,20,null]	[1,2,0]	2
3	[19,20,30]	[1,2,3]	3
4	[null,null,null]	[0,0,0]	0

Why is the symbology only 0 or 1?

Re: Arcade Symbology

MartijnJansma — Fri, 15 May 2020 13:43:58 GMT

Results are indeed as expected.

WHy the symbology only returns options for 0 and 1 is what puzzles me.

Ultimately I want to define the Symbology on the values 0 - 3, yet I am left with only 0 and 1 as options.

Re: Arcade Symbology

XanderBakker — Fri, 15 May 2020 13:54:15 GMT

Hi martijn.jansma_BTL ,

Just to be sure... your data does contain all the different situations, right?

If you want me to take a look at it, you can share the map and data to a group and invite me to it (xbakker.spx).

Re: Arcade Symbology

MartijnJansma — Mon, 25 May 2020 14:28:37 GMT

Hi Xander,

I have added you to a group.

Problem seems to have been resolved now that more of the data was collected.

All possible situations were present at the time of testing though.

Does % of filled fields matter in this symoblogy?

eg. 1000 object, 500 contain Case 1 (as mentioned in your comment 15-5-2020), 80 contain Case 2, 20 Case 3, 400 Case 4.

Re: Arcade Symbology

XanderBakker — Tue, 26 May 2020 13:31:42 GMT

Thanks for adding me to the group. I looked at the expression and it seems to work. It is a bit strange that the values 2 and 3 are not added directly to the legend, but you can include them clicking on the grey single arrows pointing north:

Then you will be able to define the symbology that you want to apply:

and every class will be visualized with the symbology defined by you:

Re: Arcade Symbology

NathanBush1 — Mon, 21 Sep 2020 16:35:47 GMT

This is good stuff!

I have this bit of code to assign intuitive labels to my categories, but Id also like to assign certain colors to each category, and order as in the code:

This is my results so far...

Re: Arcade Symbology

XanderBakker — Mon, 21 Sep 2020 19:34:41 GMT

Hi Nathan Bush ,

The order of the items van be changed directly in ArcGIS Online. Just drag and drop the items in the order you want to use. You are missing two categories based on the expression you shared: 25-60% and UNKNOWN. It is possible that in the data used to generate the legend, these two clases are not present. It may be present later on, if this data is dynamic and you are in the process of collecting the data. ArcGIS Online is a bit limited in adding multiples classes to the legend.

To solve this, you can edit the actual json that defines the legend in the webmap using ArcGIS Online Assistant . Please make a copy first before editing the json of the web map.

Re: Arcade Symbology

NathanBush1 — Tue, 22 Sep 2020 11:25:34 GMT

Hi Xander,

I'm trying to get away from having to make manual changes to the order...I have over a hundred similar layers that need to be in the same order and same color for each category.

You're right about the missing categories, the data is just not present yet.

Re: Arcade Symbology

XanderBakker — Tue, 22 Sep 2020 13:12:15 GMT

Hi Nathan Bush ,

You example refers to Alligator Weed, which is a plan species, so I guess that you are working with 100+ different type of species. Is that correct? Do these 100+ layers that you are working with only differ on the attribute used for creating the legend, or are the differences bigger?

If they are bigger, some handwork will be involved to create the correct legends. If they are simular, you could probably use ArcGIS Pro (if you have access to it) and create a layer file that you apply after editing the arcade symbology expression.