Requête pour appliquer une symbologie en fonction de la valeur d’un champ

Question

J’ai plusieurs milliers de points dans une carte Web, chacun ayant sa propre catégorie de symbologie. Existe-t-il un moyen d’appliquer une symbologie donnée en fonction de la valeur d’un champ ? Par exemple, une expression Arcade :

IIF($Attatchment != "", utiliser ce symbole, s’il est vide, ne rien changer)

Le champ qui m’intéresse concerne les pièces jointes. Des utilisateurs vont sur le terrain et prennent des photos des points. Il serait idéal que les équipes sur le terrain puissent voir, grâce à la symbologie, si une pièce jointe contenant une image est déjà associée au point. Il n’est pas envisageable de les modifier manuellement.

La couche source de ces points est hébergée sur Arc Server. J’y ai accès depuis ma machine locale dans ArcMap, au cas où cela ouvrirait d’autres possibilités.

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.