What I have is:
Output Area Polygon layer, Building Polygon layer, with Area stat appended, Union layer between the two above
The end goal is to be able to colour the Output Areas based on what amount of building area there is in each.
I've been trying to us GroupStats to try build that, but I've been getting errors that look like: "AttributeError:'NoneType' object has no attribute 'area'"
I take this to mean, the Output Areas that contain no buildings have Null entries in that field, and GroupStats can't handle that? I don't know though.
Does anyone know what I'm getting wrong here?