Class TerrainSampler

constructor

• new TerrainSampler(options): TerrainSampler

• Parameters

  • options: {
        url: string;
        zoom: number;
    }

    • url: string

      高程文件地址

    • zoom: number

      采样的瓦片等级

  Returns TerrainSampler

url

zoom

_requests

sample

• sample(lng, lat): Promise<undefined | number>

• 异步获取指定经纬度的高程,成功时返回高程，失败时返回undefined

  Parameters

  • lng: number
  • lat: number

  Returns Promise<undefined | number>

_loadTiff

• _loadTiff(url): Promise<null | {
      width: number;
      height: number;
      transform: number[];
      data: Int16Array<ArrayBuffer>;
  }>

• Parameters

  • url: string

  Returns Promise<null | {
      width: number;
      height: number;
      transform: number[];
      data: Int16Array<ArrayBuffer>;
  }>