Regarding control points:
If I understand correctly, there isn't a way to access control point vertex coordinates using Python. Could that functionality be added?
You should be able to access the control point information with the ArcPy CIM access, see the symbols CIM definitions for the item types. There are a few different elements in the CIM to support this behavior, I'd recommend you try experimenting with some data, then extract the CIM from the .aprx you're using to examine its structure. The ArcPy class works well, but a working mental model of the CIM layout is important to make effective use of it.
Cheers, Shaun
Ok. Thanks. Feel free to close.
Closed as already offered as per the discussion above, the recommended solution provided by @ShaunWalbridge is copied here for convenience:
You should be able to access the control point information with the ArcPy CIM access, see the symbols CIM definitions for the item types. There are a few different elements in the CIM to support this behavior, I'd recommend you try experimenting with some data, then extract the CIM from the .aprx you're using to examine its structure. The ArcPy class works well, but a working mental model of the CIM layout is important to make effective use of it.
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