Arcadeを使ったArcGIS Online / Portalのシンボル設定

Question

こんにちは。

ArcGIS Online / Portalでシンボル設定やラベリングに新しい言語Arcadeを使えるのは、とても素晴らしいと思いました。

現在、次のような問題が発生しています。

Arcadeを使って2つのフィールドに基づいてシンボルを設定し、それらを連結してシンボル用の1つの値にすると、マップやフィーチャ テンプレートでシンボルが表示されなくなり、黒い点だけが表示されます。

フィーチャ サービスには、連結したフィールドに基づく独自のフィーチャ テンプレートがありますが、編集時に作成したシンボル（マーカー）が表示されません。

なぜこうなるのか、何かお心当たりはありませんか。

よろしくお願いします。

Karsten

XanderBakker · Answer

Hi Karsten Rank ,

Not sure if I understand your question correctly, but if you want to publish a layer that has a dynamic calculation inside of it, you might want to look at attribute rules. With calculation attribute rules you can have a trigger that the creation of a new feature starts the calculation of a field based on other fields automatically.

More info here:

* https://pro.arcgis.com/en/pro-app/help/data/geodatabases/overview/an-overview-of-attribute-rules.htm
* https://www.esri.com/arcgis-blog/products/arcgis-pro/data-management/attribute-rules-whats-new-in-arcgis-pro-2-3-and-arcgis-enterprise-10-7/

KarstenRank · Answer

I want to create a symbology depending on two field on the flow.. E.g. if you have five different layers with 20 different symbols, the editor widget is overloaded with 100 symbols.

So my idea was to show only a standard symbol and by changing the attributes, the symbol should change.

Is it possible to publish a field calculation with ArcGIS Pro to a Portal feature service?

XanderBakker · Answer

Hi Karsten Rank ,

What I think is happening is that there is no support for the edit templates to be based on a "virtual field" created with an Arcade expression. I can imagine that you would like to select a concatenated value and that this would fill the two fields it is based. Is that what you want to achieve?

You can use the field calculation and create a actual field for the concatenated values (for which you could define a domain with the accepted values) and create two expressions to extract both parts from this field. That would work.