LocationService / Client / calculate_route

calculate_route

LocationService.Client.calculate_route(**kwargs)

Calculates a route given the following required parameters: DeparturePosition and DestinationPosition. Requires that you first create a route calculator resource.

By default, a request that doesn’t specify a departure time uses the best time of day to travel with the best traffic conditions when calculating the route.

Additional options include:

• Specifying a departure time using either DepartureTime or DepartNow. This calculates a route based on predictive traffic data at the given time.

Note

You can’t specify both DepartureTime and DepartNow in a single request. Specifying both parameters returns a validation error.

• Specifying a travel mode using TravelMode sets the transportation mode used to calculate the routes. This also lets you specify additional route preferences in CarModeOptions if traveling by Car, or TruckModeOptions if traveling by Truck.

Note

If you specify walking for the travel mode and your data provider is Esri, the start and destination must be within 40km.

See also: AWS API Documentation

Request Syntax

response = client.calculate_route(
    CalculatorName='string',
    CarModeOptions={
        'AvoidFerries': True|False,
        'AvoidTolls': True|False
    },
    DepartNow=True|False,
    DeparturePosition=[
        123.0,
    ],
    DepartureTime=datetime(2015, 1, 1),
    DestinationPosition=[
        123.0,
    ],
    DistanceUnit='Kilometers'|'Miles',
    IncludeLegGeometry=True|False,
    Key='string',
    TravelMode='Car'|'Truck'|'Walking'|'Bicycle'|'Motorcycle',
    TruckModeOptions={
        'AvoidFerries': True|False,
        'AvoidTolls': True|False,
        'Dimensions': {
            'Height': 123.0,
            'Length': 123.0,
            'Unit': 'Meters'|'Feet',
            'Width': 123.0
        },
        'Weight': {
            'Total': 123.0,
            'Unit': 'Kilograms'|'Pounds'
        }
    },
    WaypointPositions=[
        [
            123.0,
        ],
    ]
)

Parameters:

• CalculatorName (string) –

  [REQUIRED]

  The name of the route calculator resource that you want to use to calculate the route.

• CarModeOptions (dict) –

  Specifies route preferences when traveling by Car, such as avoiding routes that use ferries or tolls.

  Requirements: TravelMode must be specified as Car.

  • AvoidFerries (boolean) –

    Avoids ferries when calculating routes.

    Default Value: false

    Valid Values: false | true

  • AvoidTolls (boolean) –

    Avoids tolls when calculating routes.

    Default Value: false

    Valid Values: false | true

• DepartNow (boolean) –

  Sets the time of departure as the current time. Uses the current time to calculate a route. Otherwise, the best time of day to travel with the best traffic conditions is used to calculate the route.

  Default Value: false

  Valid Values: false | true

• DeparturePosition (list) –

  [REQUIRED]

  The start position for the route. Defined in World Geodetic System (WGS 84) format: [longitude, latitude].

  • For example, [-123.115, 49.285]

  Note

  If you specify a departure that’s not located on a road, Amazon Location moves the position to the nearest road. If Esri is the provider for your route calculator, specifying a route that is longer than 400 km returns a 400 RoutesValidationException error.

  Valid Values: [-180 to 180,-90 to 90]

  • (float) –

• DepartureTime (datetime) –

  Specifies the desired time of departure. Uses the given time to calculate the route. Otherwise, the best time of day to travel with the best traffic conditions is used to calculate the route.

  Note

  Setting a departure time in the past returns a 400 ValidationException error.

  • In ISO 8601 format: YYYY-MM-DDThh:mm:ss.sssZ. For example, 2020–07-2T12:15:20.000Z+01:00

• DestinationPosition (list) –

  [REQUIRED]

  The finish position for the route. Defined in World Geodetic System (WGS 84) format: [longitude, latitude].

  • For example, [-122.339, 47.615]

  Note

  If you specify a destination that’s not located on a road, Amazon Location moves the position to the nearest road.

  Valid Values: [-180 to 180,-90 to 90]

  • (float) –

• DistanceUnit (string) –

  Set the unit system to specify the distance.

  Default Value: Kilometers

• IncludeLegGeometry (boolean) –

  Set to include the geometry details in the result for each path between a pair of positions.

  Default Value: false

  Valid Values: false | true

• Key (string) – The optional API key to authorize the request.

• TravelMode (string) –

  Specifies the mode of transport when calculating a route. Used in estimating the speed of travel and road compatibility. You can choose Car, Truck, Walking, Bicycle or Motorcycle as options for the TravelMode.

  Note

  Bicycle and Motorcycle are only valid when using Grab as a data provider, and only within Southeast Asia.

  Truck is not available for Grab.

  For more details on the using Grab for routing, including areas of coverage, see GrabMaps in the Amazon Location Service Developer Guide.

  The TravelMode you specify also determines how you specify route preferences:

  • If traveling by Car use the CarModeOptions parameter.

  • If traveling by Truck use the TruckModeOptions parameter.

  Default Value: Car

• TruckModeOptions (dict) –

  Specifies route preferences when traveling by Truck, such as avoiding routes that use ferries or tolls, and truck specifications to consider when choosing an optimal road.

  Requirements: TravelMode must be specified as Truck.

  • AvoidFerries (boolean) –

    Avoids ferries when calculating routes.

    Default Value: false

    Valid Values: false | true

  • AvoidTolls (boolean) –

    Avoids tolls when calculating routes.

    Default Value: false

    Valid Values: false | true

  • Dimensions (dict) –

    Specifies the truck’s dimension specifications including length, height, width, and unit of measurement. Used to avoid roads that can’t support the truck’s dimensions.

    • Height (float) –

      The height of the truck.

      • For example, 4.5.

      Note

      For routes calculated with a HERE resource, this value must be between 0 and 50 meters.

    • Length (float) –

      The length of the truck.

      • For example, 15.5.

      Note

      For routes calculated with a HERE resource, this value must be between 0 and 300 meters.

    • Unit (string) –

      Specifies the unit of measurement for the truck dimensions.

      Default Value: Meters

    • Width (float) –

      The width of the truck.

      • For example, 4.5.

      Note

      For routes calculated with a HERE resource, this value must be between 0 and 50 meters.

  • Weight (dict) –

    Specifies the truck’s weight specifications including total weight and unit of measurement. Used to avoid roads that can’t support the truck’s weight.

    • Total (float) –

      The total weight of the truck.

      • For example, 3500.

    • Unit (string) –

      The unit of measurement to use for the truck weight.

      Default Value: Kilograms

• WaypointPositions (list) –

  Specifies an ordered list of up to 23 intermediate positions to include along a route between the departure position and destination position.

  • For example, from the DeparturePosition [-123.115, 49.285], the route follows the order that the waypoint positions are given [[-122.757, 49.0021],[-122.349, 47.620]]

  Note

  If you specify a waypoint position that’s not located on a road, Amazon Location moves the position to the nearest road.

  Specifying more than 23 waypoints returns a 400 ValidationException error.

  If Esri is the provider for your route calculator, specifying a route that is longer than 400 km returns a 400 RoutesValidationException error.

  Valid Values: [-180 to 180,-90 to 90]

  • (list) –

    • (float) –

Return type:

dict

Returns:

Response Syntax

{
    'Legs': [
        {
            'Distance': 123.0,
            'DurationSeconds': 123.0,
            'EndPosition': [
                123.0,
            ],
            'Geometry': {
                'LineString': [
                    [
                        123.0,
                    ],
                ]
            },
            'StartPosition': [
                123.0,
            ],
            'Steps': [
                {
                    'Distance': 123.0,
                    'DurationSeconds': 123.0,
                    'EndPosition': [
                        123.0,
                    ],
                    'GeometryOffset': 123,
                    'StartPosition': [
                        123.0,
                    ]
                },
            ]
        },
    ],
    'Summary': {
        'DataSource': 'string',
        'Distance': 123.0,
        'DistanceUnit': 'Kilometers'|'Miles',
        'DurationSeconds': 123.0,
        'RouteBBox': [
            123.0,
        ]
    }
}

Response Structure

• (dict) –

  Returns the result of the route calculation. Metadata includes legs and route summary.

  • Legs (list) –

    Contains details about each path between a pair of positions included along a route such as: StartPosition, EndPosition, Distance, DurationSeconds, Geometry, and Steps. The number of legs returned corresponds to one fewer than the total number of positions in the request.

    For example, a route with a departure position and destination position returns one leg with the positions snapped to a nearby road:

    • The StartPosition is the departure position.

    • The EndPosition is the destination position.

    A route with a waypoint between the departure and destination position returns two legs with the positions snapped to a nearby road:

    • Leg 1: The StartPosition is the departure position . The EndPosition is the waypoint positon.

    • Leg 2: The StartPosition is the waypoint position. The EndPosition is the destination position.

    • (dict) –

      Contains the calculated route’s details for each path between a pair of positions. The number of legs returned corresponds to one fewer than the total number of positions in the request.

      For example, a route with a departure position and destination position returns one leg with the positions snapped to a nearby road:

      • The StartPosition is the departure position.

      • The EndPosition is the destination position.

      A route with a waypoint between the departure and destination position returns two legs with the positions snapped to a nearby road:

      • Leg 1: The StartPosition is the departure position . The EndPosition is the waypoint positon.

      • Leg 2: The StartPosition is the waypoint position. The EndPosition is the destination position.

      • Distance (float) –

        The distance between the leg’s StartPosition and EndPosition along a calculated route.

        • The default measurement is Kilometers unless the request specifies a DistanceUnit of Miles.

      • DurationSeconds (float) –

        The estimated travel time between the leg’s StartPosition and EndPosition. The travel mode and departure time that you specify in the request determines the calculated time.

      • EndPosition (list) –

        The terminating position of the leg. Follows the format [longitude,latitude].

        Note

        If the EndPosition isn’t located on a road, it’s snapped to a nearby road.

        • (float) –

      • Geometry (dict) –

        Contains the calculated route’s path as a linestring geometry.

        • LineString (list) –

          An ordered list of positions used to plot a route on a map.

          The first position is closest to the start position for the leg, and the last position is the closest to the end position for the leg.

          • For example, [[-123.117, 49.284],[-123.115, 49.285],[-123.115, 49.285]]

          • (list) –

            • (float) –

      • StartPosition (list) –

        The starting position of the leg. Follows the format [longitude,latitude].

        Note

        If the StartPosition isn’t located on a road, it’s snapped to a nearby road.

        • (float) –

      • Steps (list) –

        Contains a list of steps, which represent subsections of a leg. Each step provides instructions for how to move to the next step in the leg such as the step’s start position, end position, travel distance, travel duration, and geometry offset.

        • (dict) –

          Represents an element of a leg within a route. A step contains instructions for how to move to the next step in the leg.

          • Distance (float) –

            The travel distance between the step’s StartPosition and EndPosition.

          • DurationSeconds (float) –

            The estimated travel time, in seconds, from the step’s StartPosition to the EndPosition. . The travel mode and departure time that you specify in the request determines the calculated time.

          • EndPosition (list) –

            The end position of a step. If the position the last step in the leg, this position is the same as the end position of the leg.

            • (float) –

          • GeometryOffset (integer) –

            Represents the start position, or index, in a sequence of steps within the leg’s line string geometry. For example, the index of the first step in a leg geometry is 0.

            Included in the response for queries that set IncludeLegGeometry to True.

          • StartPosition (list) –

            The starting position of a step. If the position is the first step in the leg, this position is the same as the start position of the leg.

            • (float) –

  • Summary (dict) –

    Contains information about the whole route, such as: RouteBBox, DataSource, Distance, DistanceUnit, and DurationSeconds.

    • DataSource (string) –

      The data provider of traffic and road network data used to calculate the route. Indicates one of the available providers:

      • Esri

      • Grab

      • Here

      For more information about data providers, see Amazon Location Service data providers.

    • Distance (float) –

      The total distance covered by the route. The sum of the distance travelled between every stop on the route.

      Note

      If Esri is the data source for the route calculator, the route distance can’t be greater than 400 km. If the route exceeds 400 km, the response is a 400 RoutesValidationException error.

    • DistanceUnit (string) –

      The unit of measurement for route distances.

    • DurationSeconds (float) –

      The total travel time for the route measured in seconds. The sum of the travel time between every stop on the route.

    • RouteBBox (list) –

      Specifies a geographical box surrounding a route. Used to zoom into a route when displaying it in a map. For example, [min x, min y, max x, max y].

      The first 2 bbox parameters describe the lower southwest corner:

      • The first bbox position is the X coordinate or longitude of the lower southwest corner.

      • The second bbox position is the Y coordinate or latitude of the lower southwest corner.

      The next 2 bbox parameters describe the upper northeast corner:

      • The third bbox position is the X coordinate, or longitude of the upper northeast corner.

      • The fourth bbox position is the Y coordinate, or latitude of the upper northeast corner.

      • (float) –

Exceptions

• LocationService.Client.exceptions.InternalServerException

• LocationService.Client.exceptions.ResourceNotFoundException

• LocationService.Client.exceptions.AccessDeniedException

• LocationService.Client.exceptions.ValidationException

• LocationService.Client.exceptions.ThrottlingException