Automatically populate sequential numbering for newly created features in ArcGIS Field Maps using Arcade

Summary

Creating sequential numberings for newly created features in ArcGIS Field Maps is a practical and effective way to manage and organize data during the data collection process, as it ensures data integrity, organization, and ease of analysis. This article describes the steps to create sequential numbering for newly created features in Field Maps using an Arcade expression.

Procedure

1. Open the project in the ArcGIS Field Maps Designer web app.
2. In the form, click the relative field. The Properties pane opens.

3. In the Properties pane, under the Logic section, click Expressions  next to Calculated expression.
4. In the Calculated expressions pop-up, click + New expression. The Arcade editor window opens.

5. In the Title text box, add a title for the expression.
6. Copy the following expression into the Arcade editor window.

var numberlist = FeatureSetByName($map,"<layer_name>")
var topnum = Top(OrderBy(numberlist,'<field_name> DESC'),1)
var counter = Number(Max(topnum,'<field_name>'))
var id = counter+1

return id

1. Replace <layer_name> with the name of the layer containing the field. In this example, the TX_Tornadoes layer is used.
2. Replace <field_name> with the name of the field containing the field values. In this example, ORIG_FID is used.

7. Click Run.
8. Click Done to close the Arcade editor window.

The image below shows the sequential number for the field automatically updated in the form when a new point is added to the map.