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Populate all symbology options in an Arcade expression not just those in the data.

AndrewMurphy3

Symbolising using Arcade for values not in the Feature Layer

I would like the ability to add Symbology options from an Arcade Expression even if they are not in the data. For instance the following Arcade statement has 8 potential symbology options. Currently only those that are existing in the underlying feature layer appear as a symbology option. E.g. If there is no instance of OperationalStatus == 'Planned' in the data the ability to symbolise this is not available.

var operationalStatus = $feature.OPERATIONALSTATUS;
var ownership = $feature.OWNERSHIP;
return When(
operationalStatus == "In Service", 1,
ownership == "PPP", 2,
operationalStatus == "OOS Abandoned", 3,
operationalStatus == "OOS Demolished", 4,
operationalStatus == "OOS Maintained", 5,
operationalStatus == "Planned", 6,
operationalStatus == "Disposed", 7,
999
);

In the example below the option to symbolise option 999 is not available because all values in the data are covered by the other parts of the statement.

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Status: Closed

Comments

ZachBodenner

Yeah I've run into this too and should probably have submitted the idea a while ago too. I have just been getting around it by spoofing some data, but that's not really good practice (or practical depending on the number of categories).

AndrewMurphy3

Thats probably what I'll have to end up doing to get all the combinations into the data. For me it will be the practicality but can point at a dev instance of the data with added records to get the symbology sorted out. Thanks for posting!

ZachBodenner

For sure! If I remember correctly, once you can save a layer file with all the symbols you can just use that to populate the symbology if you ever need to redo it.

RPGIS

My only suggestion may be to return a text value or replace 999 with "999" in quotes. It could be that it is trying to add a numerical value to all values when they are returned as text. Just a suggestion.

williamscraigm

Generically speaking, we can not anticipate all outputs of a script that processes a data value as input. Your case is quite simple, but not all scripts are making this a problem that is not solvable for all cases. Additional classes that are not found can be added in the unique value symbology.

I'd recommend looking at coded value domains for your scenario.