I have two polygon layers, a vegetation layer and a treatment layer. I want to add a field to the attribute layer of the vegetation layer to indicate if any part of the polygon has been treated (overlaps with a treatment layer).
For the above example - I want an attribute table that ends up looking like
I do not want to intersect the two layers - I need to keep the full polygons in the vegetation layer, I just want to know if they've been treated. There are too many polygons to do this manually.
To do this I would use the Intersect tool which creates a new feature class that includes the feature IDs of both input feature classes.
You can then use a join to isolate any features in either of the input feature classes (which retain their full polygons) to update a flag field to indicate their overlap.