AreaAlongRoute

public struct AreaAlongRoute

Defines an area along a route for prefetching.

  • Default value constants for AreaAlongRoute parameters.

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    Declaration

    Swift

    public enum Defaults
  • The ‘corridor’ is defined as the sum of the areas to the left and to the right of the central route polyline. corridorWidth measures its total width. (Another way to think about this is to say that the corridor consists of all places within [corridorWidth / 2] of the central route polyline, in all directions equally.) The default value is 0 meters, making the corridor very narrow (but still existent) which means that no extra tiles will be downloaded on top of those through which the polyline passes already. The larger the area, the more robust the system is to temporary unavailability of the map data source, but at a greater memory and bandwidth cost.

    Declaration

    Swift

    public let corridorWidth: Measurement<UnitLength>
  • Determinates the minimum corridor length to prefetch, ensuring it’s downloaded and available even in case of later connectivity loss. Eg. on 200km route, we will prefetch at least the first corridorMinLength. Updating route current position will effectively move the ‘sliding window’.

    Important

    This is a Public Preview API. It may be changed or removed at any time.

    Declaration

    Swift

    public let corridorMinLength: Measurement<UnitLength>