Angle from True North.
Namespace:
Autodesk.Revit.DB
Assembly:
RevitAPI
(in RevitAPI.dll) Version: 18.0.0.0 (18.0.0.420)
Syntax
Remarks
This is the angle difference between project north and true north measured in
radians. It can have a value from -PI to PI.
If the parameter value is outside that range, it
will be shifted by 2*PI until it falls into range.