NotificationUserInfoKey

A key in the user info dictionary of a Notification.Name.electronicHorizonDidUpdatePosition notification. The corresponding value is a RoadGraph.Position indicating the current position in the road graph.

A key in the user info dictionary of a Notification.Name.electronicHorizonDidUpdatePosition notification. The corresponding value is an RoadGraph.Edge at the root of a tree of edges in the routing graph. This graph represents a probable path (or paths) of a vehicle within the routing graph for a certain distance in front of the vehicle, thus extending the user’s perspective beyond the “visible” horizon as the vehicle’s position and trajectory change.

A key in the user info dictionary of a Notification.Name.electronicHorizonDidUpdatePosition notification. The corresponding value is a Boolean value of true if the position update indicates a new most probable path (MPP) or false if it updates an existing MPP that the user has continued to follow.

An electronic horizon can represent a new MPP in three scenarios:

• An electronic horizon is detected for the very first time.
• A user location tracking error leads to an MPP completely distinct from the previous MPP.
• The user has departed from the previous MPP, for example by driving to a side path of the previous MPP.

A key in the user info dictionary of a Notification.Name.electronicHorizonDidUpdatePosition notification. The corresponding value is an array of upcoming road object distances from the user’s current location as DistancedRoadObject values.

A key in the user info dictionary of a Notification.Name.electronicHorizonDidEnterRoadObject or Notification.Name.electronicHorizonDidExitRoadObject notification. The corresponding value is a RoadObject.Identifier identifying the road object that the user entered or exited.

A key in the user info dictionary of a Notification.Name.electronicHorizonDidEnterRoadObject or Notification.Name.electronicHorizonDidExitRoadObject notification. The corresponding value is an NSNumber containing a Boolean value set to true if the user entered at the beginning or exited at the end of the road object, or false if they entered or exited somewhere along the road object.