Angle from True North.
Namespace:
Autodesk.Revit.DB
Assembly:
RevitAPI
(in RevitAPI.dll) Version: 21.0.0.0 (21.1.1.109)
Syntax
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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.