class ZoomedLayoutScheme extends LayoutScheme

Layout for zoom levels based off of a power-of-2 scheme, used in Leaflet et al.

Linear Supertypes
LayoutScheme, Serializable, Serializable, AnyRef, Any
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  1. ZoomedLayoutScheme
  2. LayoutScheme
  3. Serializable
  4. Serializable
  5. AnyRef
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Instance Constructors

  1. new ZoomedLayoutScheme(crs: CRS, tileSize: Int, resolutionThreshold: Double)

    crs

    The CRS this zoomed layout scheme will be using

    tileSize

    The size of each tile in this layout scheme

    resolutionThreshold

    The percentage difference between a cell size and a zoom level and the resolution difference between that zoom level and the next that is tolerated to snap to the lower-resolution zoom level. For example, if this paramter is 0.1, that means we're willing to downsample rasters with a higher resolution in order to fit them to some zoom level Z, if the difference is resolution is less than or equal to 10% the difference between the resolutions of zoom level Z and zoom level Z+1.

Value Members

  1. val crs: CRS
  2. def levelFor(extent: Extent, cellSize: CellSize): LayoutLevel
    Definition Classes
    ZoomedLayoutScheme → LayoutScheme
  3. def levelForZoom(worldExtent: Extent, id: Int): LayoutLevel
  4. def levelForZoom(id: Int): LayoutLevel
  5. val resolutionThreshold: Double
  6. val tileSize: Int
  7. def toString(): String
    Definition Classes
    ZoomedLayoutScheme → AnyRef → Any
  8. def zoom(x: Double, y: Double, cellSize: CellSize): Int

    This will calcluate the closest zoom level based on the resolution in a UTM zone containing the point.

    This will calcluate the closest zoom level based on the resolution in a UTM zone containing the point. The calculated zoom level is up to some percentage (determined by the resolutionThreshold) less resolute then the cellSize. If the cellSize is more resolute than that threshold's allowance, this will return the next zoom level up.

  9. def zoomIn(level: LayoutLevel): LayoutLevel
    Definition Classes
    ZoomedLayoutScheme → LayoutScheme
  10. def zoomOut(level: LayoutLevel): LayoutLevel
    Definition Classes
    ZoomedLayoutScheme → LayoutScheme