フィールド値に基づいてシンボルを適用するクエリ

Question

Webマップに数千個のポイントがあり、それぞれに独自のシンボルカテゴリが設定されています。フィールドの値に基づいて特定のシンボルを適用する方法はありますか？たとえば、次のような Arcade 式です。

IIF($Attatchment != "", このシンボルを使用し、空欄なら変更しない)

知りたいのは添付ファイルのフィールドです。現場に出たユーザーがポイントの写真を撮影しています。シンボルを見れば、そのポイントに画像が添付されているかどうかを現場のスタッフが確認できると理想的です。これらを手作業で変更するのは現実的ではありません。

これらのポイントのソースレイヤーは Arc Server でホストされています。ArcMap ではローカルマシンからアクセスできます。そうすることで、ほかに考えられる解決策があれば教えてください。

XanderBakker · Answer

Good one, I forgot that I posted that option... There might be another alternative. Will dive into that and post later...

Edit: I guess you could use the suggestion provided by Nat Carter (see last comment: https://community.esri.com/thread/117274#comment-695968 ) to create two layers and include a definition query and publish those. It works in Desktop and might work in the published service too.

Anonymous User · Answer

Howdy!

It looks like you can run some custom symbology logic from the root data (How to symbolize which features have attachments? ) and then should be able to publish up using that symbology logic.

If that doesn't work for you, you could also have a Python logic that parses the feature's endpoints for the attachment count: Attachment Infos (Feature ID: 298186). You'll probably need some solid experience with Python and XML/JSON parsing, but it could also accomplish what you're looking for.

XanderBakker · Answer

When you apply Arcade for symbology you will return values (numbers or strings) that you will base your symbology on. There is another aspect to take into account and that is the fact that the attachment is in a related table, not in the feature layer itself, so your Arcade script does not have access to it (yet, since this will probably be possible in a future release or Arcade).

You can create a script (and program a scheduled task) that will populate a field (with the count of related attachments or a simple "Yes", "No") that you can use to symbology the data on indicating if a geometry has an attachment.