Is it possible to control the radius searched when the identify widget is invoked? The out of the box distance is returning too many features due to the close proximity of features in my dataset, even when zoomed in tight.
Sure in the in the Identify widgets configuration UI you can set the "Identify Tolerance", by default it is set to 5 pixels.
This work with identify widget. Can I do the same thing with regular popup that originally setup in AGOL?
No the "regular popup that originally setup in AGOL" does not use the identify task.
Retrieving data ...