Waypoints and custom routes

VERSION 0.2.1455
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Planning a route may involve locations beyond the origin and destination. These can be used in two different ways:

  • Adding Waypoints to a route. These can be stops along the way, or places that the user wants to pass by during the journey.
  • Constructing a custom route from a polyline (defined as a list of supporting points). This allows users to import routes from another source or reconstruct driven paths.

Waypoints

In a more advanced navigation experience, the user may want to provide more locations through which the route should be calculated. These optional intermediate locations are known as waypoints.

The maximum allowed number of waypoints is 150.

Waypoints are defined using an array of ItineraryPoints, which is stored in the waypoints property of the Itinerary type. The Itinerary type is stored in the itinerary property of RoutingOptions. Each ItineraryPoint includes: - an id property, used to synchronize between the waypoints in the input to planning (RoutingOptions) and those in the output (Route). - a place property of the type Place, which includes the place’s coordinates (CLLocationCoordinate2D), plus its name and address if they are supplied.

There are two options for defining waypoints while creating RoutingOptions: with just its coordinates or with detailed data as well.

To define a waypoint using only its coordinates:

1let amsterdamCoordinate = CLLocationCoordinate2DMake(52.3764527, 4.9062047)
2let berlinCoordinate = CLLocationCoordinate2DMake(52.5069751, 13.3631919)
3let hagueCoordinate = CLLocationCoordinate2DMake(52.078663, 4.288788)
4
5let options = RoutingOptionsBuilder(origin: amsterdamCoordinate, destination: berlinCoordinate)
6 .with(waypointCoordinate: hagueCoordinate)
7 .build()

To define a waypoint using its coordinates, address, and name:

1let amsterdamCoordinate = CLLocationCoordinate2DMake(52.3764527, 4.9062047)
2let berlinCoordinate = CLLocationCoordinate2DMake(52.5069751, 13.3631919)
3let hagueCoordinate = CLLocationCoordinate2DMake(52.078663, 4.288788)
4let hagueAddress = Address(
5 streetNumber: "70",
6 streetName: "De Perponcherstraat",
7 municipality: "Den Haag",
8 postalCode: "2518 SW",
9 country: "The Netherlands"
10)
11let haguePlace = Place(coordinate: hagueCoordinate, name: "Den Haag", address: hagueAddress)
12
13let options = RoutingOptionsBuilder(origin: amsterdamCoordinate, destination: berlinCoordinate)
14 .with(waypoint: ItineraryPoint(place: haguePlace))
15 .build()

RoutingOptionsBuilder has several ways to add waypoints to RoutingOptions. You can choose the one that best fits your purposes. There are two methods for adding waypoints with only coordinates:

public func with(waypointCoordinate: CLLocationCoordinate2D) → Self public func with(waypointCoordinates: [CLLocationCoordinate2D]) → Self

There are also two methods for adding waypoints with the full Place model:

public func with(waypoint: ItineraryPoint) → Self public func with(waypoints: [ItineraryPoint]) → Self

Route planning returns a Route array. Waypoints are included in the Route in the order they are specified in RoutingOptions. When planning a route, each waypoint results in an extra leg in the response.

The Route also contains routePoints, which is array of RoutePoint. This array includes values of types Origin, Destination and Waypoint (for respective points of route). Waypoints from this array can be accessed via the waypoints property of Route.

Custom routes

The user may want to import a custom polyline and reconstruct a route based on it. The supportingPoints parameter is used for this:

  • The provided sequence of supporting points is used as input for route reconstruction.
  • Alternative routes are calculated between the origin and destination points specified in the base path parameter locations.
  • If both minDeviationDistance and minDeviationTime are set to zero, the origin and destination points are expected to be at (or very near) the beginning and end of the reference route.
  • Waypoints are not supported when using the supportingPoints parameter.
  • The reference route may contain traffic incidents, which are ignored for the calculation of travel time and traffic delay for the reference route.
1let amsterdamCoordinate = CLLocationCoordinate2DMake(52.3764527, 4.9062047)
2let berlinCoordinate = CLLocationCoordinate2DMake(52.5069751, 13.3631919)
3let supportingPoints = loadSupportingPointsFromFile()
4
5let options = RoutingOptionsBuilder(origin: amsterdamCoordinate, destination: berlinCoordinate)
6 .with(supportingPoints: supportingPoints)
7 .with(minDeviationDistance: 100)
8 .with(minDeviationTime: 10)
9 .build()