Is there a way to automatically calculate a Length field in Classic Collector? I need to be able to use this field in webapps and Ops Dashboards and the system default field isn't available.
I have created an Attribute Expression using Arcade in the pop-up of the web map, but that field isn't available for me to use in Ops Dashboard.
As far as I know the length field of a polyline feature service is automatically included in the list of field and maintained by the system. It is normally switched of. Can you go into your web map and configure the pop-up window to see if the field is listed and switch it on. Once it is visible you should be able to use it in Dashboard.