TilesetDescriptorOptionsForTilesets

 
extension TilesetDescriptorOptionsForTilesets

  • Initializes a TilesetDescriptorOptionsForTilesets which is used in the creation of a TilesetDescriptor.

    Note

    The implementation loads and stores the loaded tiles in batches, each batch has a pre-defined zoom range and it contains all child tiles within the range. The zoom leveling scheme for the tile batches can be defined in Tile JSON, otherwise the default scheme is used:

    • Global coverage: 0 - 5

    • Regional information: 6 - 10

    • Local information: 11 - 14

    • Streets detail: 15 - 16

    Internally, the implementation maps the given tile pack zoom range and geometry to a set of pre-defined batches to load, therefore it is highly recommended to choose the minZoom and maxZoom values in accordance with the tile batches zoom ranges (see the list above).

    Declaration

    Swift

    public convenience init(tilesets: [String],
                        zoomRange: ClosedRange<UInt8>,
                        pixelRatio: Float = Float(UIScreen.main.scale))

    Parameters

    tilesets

    The tilesets associated with the tileset descriptor. An array, each element of which must be either a URI to a TileJSON resource or a JSON string representing the inline tileset. The provided URIs must have “mapbox://” scheme, e.g. “mapbox://mapbox.mapbox-streets-v8”.
    zoomRange

    Closed range zoom level for the tile package.
    pixelRatio

    Pixel ratio to be accounted for when downloading raster tiles. Typically this should match the scale used by the MapView, most likely UIScreen.main.scale, which is the default value.