Class TerrainRGB

Terrain RGB class implementation

Hierarchy (View Summary)

BaseTile
- TerrainRGB

Index

Constructors

Properties

maxzoom minzoom tileSize tms url

Methods

calc getElevation getValue

Constructors

constructor

new TerrainRGB(
    url: string,
    tileSize: number,
    minzoom?: number,
    maxzoom?: number,
    tms?: boolean,
): TerrainRGB
Constructor
Parameters
- url: string
  URL for terrain RGB raster tilesets
- tileSize: number
  size of tile. 256 or 512
- minzoom: number = 5
  minzoom for terrain RGB raster tilesets. default is 5
- maxzoom: number = 15
  maxzoom for terrain RGB raster tilesets. default is 15
- tms: boolean = false
  whether it is Tile Map Service
Returns TerrainRGB
Overrides BaseTile.constructor
- Defined in terrainrgb.ts:15

Properties

`Protected`maxzoom

maxzoom: number

`Protected`minzoom

minzoom: number

`Protected`tileSize

tileSize: number

`Protected`tms

tms: boolean

`Protected`url

url: string

Methods

`Protected`calc

calc(r: number, g: number, b: number): number
Formula for calculating an elevation from RGB
Parameters
- r: number
  red
- g: number
  green
- b: number
  blue
Returns number
an elevation calculated
Overrides BaseTile.calc
- Defined in terrainrgb.ts:43

getElevation

getElevation(lnglat: number[], z: number): Promise<number>
Get an altitude calculated from terrain RGB information
Parameters
- lnglat: number[]
  coordinates
- z: number
  zoom level
Returns Promise<number>
an altitude calculated from terrain RGB information
- Defined in terrainrgb.ts:31

`Protected`getValue

getValue(lnglat: number[], z: number): Promise<number>
Get the value from target coordinates and zoom level by using certain formula.
Parameters
- lnglat: number[]
  coordinates
- z: number
  zoom level
Returns Promise<number>
the value calculated by certain formula
Inherited from BaseTile.getValue
- Defined in base.ts:47