Navigate route

Use a routing service to navigate between two points.

Use case

Navigation is often used by field workers while traveling between two points to get live directions based on their location.

How to use the sample

Tap “Navigate” to simulate traveling and to receive directions from a preset starting point to a preset destination. Tap “Reset” to start the simulation from the beginning.

How it works

1. Create an RouteTask using a URL to an online route service.
2. Generate default RouteParameters using RouteTask.makeDefaultParameters().
3. Set returnsRoutes, returnsStops, and returnsDirections on the parameters to true.
4. Assign all Stop objects to the route parameters using RouteParameters.setStops(_:).
5. Solve the route using RouteTask.solveRoute(using:) to get a RouteResult.
6. Create an RouteTracker using the route result, and the index of the desired route to take.
7. Create a RouteTrackerLocationDataSource with the route tracker and a SimulatedLocationDataSource object to snap the location display to the route.
8. Use RouteTracker.trackingStatus to be notified of TrackingStatus changes, and use them to display updated route information. TrackingStatus includes a variety of information on the route progress, such as the remaining distance, remaining geometry or traversed geometry (represented by an Polyline), or the remaining time (TimeInterval), amongst others.
9. Use RouteTracker.voiceGuidances to be notified of new voice guidances. From the voice guidance, get the VoiceGuidance.text representing the directions and use a text-to-speech engine to output the maneuver directions.
10. You can also query the tracking status for the current DirectionManeuver index, retrieve that maneuver from the Route, and get its direction text to display in the GUI.
11. To establish whether the destination has been reached, get the destinationStatus from the tracking status. If the destination status is reached and the remainingDestinationCount is 1, you have arrived at the destination and can stop routing. If there are several destinations on your route and the remaining destination count is greater than 1, switch the route tracker to the next destination.

Relevant API

• DestinationStatus
• DirectionManeuver
• Location
• LocationDataSource
• Route
• RouteParameters
• RouteTask
• RouteTracker
• RouteTrackerLocationDataSource
• SimulatedLocationDataSource
• Stop
• VoiceGuidance

About the data

The route taken in this sample goes from the San Diego Convention Center, site of the annual Esri User Conference, to the Fleet Science Center, San Diego.

Tags

directions, maneuver, navigation, route, turn-by-turn, voice