Configuration

When calculating whether or not the user is on the route, we look where the user will be given their speed and this variable.

Number of seconds left on step when a AlertLevel.medium alert is emitted.

Number of seconds left on step when a AlertLevel.high alert is emitted.

Radius in meters the user must enter to count as completing a step. One of two heuristics used to know when a user completes a step, see RouteControllerMaximumAllowedDegreeOffsetForTurnCompletion.

Threshold user must be in within to count as completing a step. One of two heuristics used to know when a user completes a step, see RouteControllerManeuverZoneRadius.

The users heading and the finalHeading are compared. If this number is within RouteControllerMaximumAllowedDegreeOffsetForTurnCompletion, the user has completed the step.

Maximum number of meters the user can travel away from step before RouteControllerShouldReroute is emitted.

For shorter upcoming steps, we link the AlertLevel.high instruction. If the upcoming step duration is near the duration of RouteControllerHighAlertInterval, we need to apply a bit of a buffer to prevent back to back notifications.

A multiplier of 1.2 gives us a buffer of 3 seconds, enough time insert a new instruction.

The minimum distance in the opposite direction of travel that triggers rerouting.

The minimum distance threshold used for giving a “Continue” type instructions.

Minimum duration remaining in seconds for proactive rerouting to be active.

Minimum number of consecutive location updates moving backwards before the user is rerouted.

Number of seconds reroute feedback sections are shown in the feedback view after the user is rerouted.

The number of seconds between attempts to automatically calculate a more optimal route while traveling.

In addition to calculating a more optimal route, RouteController also refreshes time-dependent statistics about the route, such as traffic congestion and the remaining duration, as long as DirectionsOptions.profileIdentifier is set to DirectionsProfileIdentifier.automobileAvoidingTraffic and RouteOptions.refreshingEnabled is set to true.

The minimum speed value before the user’s actual location can be considered over the snapped location.

A wrapper for the UserDefaults class for navigation-specific settings.

Properties are prefixed before they are stored in UserDefaults.standard.

To specify criteria when calculating routes, use the NavigationRouteOptions class. To customize the user experience during a particular turn-by-turn navigation session, use the NavigationOptions class when initializing a NavigationViewController.

Maximum angle the user puck will be rotated when snapping the user’s course to the route line.

Accepted deviation excluding horizontal accuracy before the user is considered to be off route.

Attribute name for the route line that is used for identifying different CongestionLevel along the route.

Attribute name for the route line that is used for identifying whether a RouteLeg is the current active leg.

A stop dictionary representing the default line widths of the route line by zoom level when NavigationMapViewDelegate.navigationMapView(_:routeStyleLayerWithIdentifier:source:) is undefined.

You may use this constant in your implementation of NavigationMapViewDelegate.navigationMapView(_:routeStyleLayerWithIdentifier:source:) if you want to keep the default line widths but customize other aspects of the route line.

The minium distance remaining on a route before overhead zooming is stopped.

The minimum volume for the device before a gentle warning is emitted when beginning navigation.

Given a location update, the horizontalAccuracy is used to figure out how many consective location updates to wait before rerouting due to consecutive incorrect course updates.

When calculating the user’s snapped location, this constant will be used for deciding upon which step coordinates to include in the calculation.

Minimum number of consecutive incorrect course updates before rerouting occurs.

Minimum Accuracy (maximum deviation, in meters) that the route snapping engine will accept before it stops snapping.