I have created a feature layer in ArcGIS online to manage invasive plant species populations in our Parks, that I plan on using for detection/treatment tracking purposes and for field work using Field Maps. I was wondering if there is an expression to designate intentional unique identifiers to each population (feature). I have a park code for each, and a species code for each that I calculated in the attribute table using Arcade for all features. I would like to combine these fields and also populate a number in sequence number by date.
For example, at our Dam Site Park (DS) we have multiple Ailanthus altissima (AIAL) populations. I would like for to create a field expression that will assign unique identifiers: DS_AIAL_1, DS_AIAL_2, DS_AIAL_3, etc, with numbers in sequence ordered by Date Detected (see fields below).
I am new to using Arcade and would appreciate any insight on this. Thank you!
Have the same issue here, Have you figured out??
I'm wondering the same thing. I'm new to coding and arcade but if you use the distinct function it can find unique ID.
var id= $feature.unique_id
Distinct([id], 'Unique ID is unique')
return 'Check Unique ID'
I use that code to populate a field but I think I have my variables mixed up. All my fields are reading 'Check Unique ID" but I fixed it prior to calculating that field.