Provider

public struct Provider

Configuration of a data provider.

  • Provides a function that generates URLs based on tile coordinates and storage level.

    Declaration

    Swift

    public var urlProvider: TileUrlRequestHandler

  • The tiling scheme used by this source.

    Declaration

    Swift

    public var tilingScheme: TilingScheme

  • The storage levels available for this data source. Supported range [0, 31]. At least one level must be available for this provider to be used as a source of data. At storage level zero, the whole world is represented by one tile. At storage level 1 the world is split in 2x2 tiles (or in 2x1 tiles, depending on the tiling scheme). The tiling process continues in this fashion until sufficient granularity has been achieved. In the XYZ addresing scheme for tiles, z value of the tile key coresponds to the storage level. Depending on the available storage levels and the given camera zoom level, the appropriate z value of the tile key will be determined.

    Declaration

    Swift

    public var storageLevels: [Int32]

  • A flag indicating whether the image content contains an alpha channel for transparency. Default value is false.

    Declaration

    Swift

    public var hasAlphaChannel: Bool

  • The optional name-value pairs specifying HTTP headers that are passed with each tile request.

    Declaration

    Swift

    public var headers: [String : String]?

  • Creates a new instance.

    Declaration

    Swift

    public init(urlProvider: @escaping TileUrlRequestHandler, tilingScheme: TilingScheme, storageLevels: [Int32], hasAlphaChannel: Bool = false, headers: [String : String]? = nil)