Class DEMData

constructor

• new DEMData(
      uid: string | number,
      data: RGBAImage | ImageData,
      encoding: DEMEncoding,
      redFactor?: number,
      greenFactor?: number,
      blueFactor?: number,
      baseShift?: number,
  ): DEMData

  Constructs a DEMData object

  Parameters

  • uid: string | number

    the tile's unique id

  • data: RGBAImage | ImageData

    RGBAImage data has uniform 1px padding on all sides: square tile edge size defines stride // and dim is calculated as stride - 2.

  • encoding: DEMEncoding

    the encoding type of the data

  • OptionalredFactor: number

    the red channel factor used to unpack the data, used for custom encoding only

  • OptionalgreenFactor: number

    the green channel factor used to unpack the data, used for custom encoding only

  • OptionalblueFactor: number

    the blue channel factor used to unpack the data, used for custom encoding only

  • OptionalbaseShift: number

    the base shift used to unpack the data, used for custom encoding only

  Returns DEMData

baseShift

blueFactor

data

dim

greenFactor

max

min

redFactor

stride

uid

backfillBorder

• backfillBorder(borderTile: DEMData, dx: number, dy: number): void

  Parameters

  • borderTile: DEMData
  • dx: number
  • dy: number

  Returns void

get

• get(x: number, y: number): number

  Parameters

  • x: number
  • y: number

  Returns number

getPixels

• getPixels(): RGBAImage

  Returns RGBAImage

getUnpackVector

• getUnpackVector(): number[]

  Returns number[]

pack

• pack(v: number): { b: number; g: number; r: number }

  Parameters

  • v: number

  Returns { b: number; g: number; r: number }

unpack

• unpack(r: number, g: number, b: number): number

  Parameters

  • r: number
  • g: number
  • b: number

  Returns number