Class: TIFFImageryProvider

tiff 图层加载器

Table of contents

Constructors

• constructor

Properties

• ready
• tilingScheme
• rectangle
• tileSize
• tileWidth
• tileHeight
• maximumLevel
• minimumLevel
• credit
• readyPromise
• hasAlphaChannel

Accessors

• isDestroyed

Methods

• fromUrl
• requestImage
• pickFeatures
• destroy

Constructors

constructor

• new TIFFImageryProvider(options): TIFFImageryProvider

tiff 图层加载器

Parameters

Name	Type	Description
options	TIFFImageryProviderOptions	初始化参数

Returns

TIFFImageryProvider

Example

const provider = await joDVF.TIFFImageryProvider.fromUrl(
  "https://oin-hotosm.s3.amazonaws.com/56f9b5a963ebf4bc00074e70/0/56f9c2d42b67227a79b4faec.tif"
);
cesiumViewer.imageryLayers.addImageryProvider(provider);

Defined in

src/layers/TIFFImageryProvider/index.ts:377

Properties

ready

• ready: boolean

获取指示提供程序是否已准备好使用的值

Memberof

TIFFImageryProvider

Defined in

src/layers/TIFFImageryProvider/index.ts:267

---

tilingScheme

• tilingScheme: GeographicTilingScheme

获取此提供程序使用的平铺方案

Memberof

TIFFImageryProvider

Defined in

src/layers/TIFFImageryProvider/index.ts:274

---

rectangle

• rectangle: Rectangle

以弧度表示此实例提供的影像的矩形

Memberof

TIFFImageryProvider

Defined in

src/layers/TIFFImageryProvider/index.ts:281

---

tileSize

• tileSize: number

获取每个瓷砖的大小

Memberof

TIFFImageryProvider

Defined in

src/layers/TIFFImageryProvider/index.ts:288

---

tileWidth

• tileWidth: number

瓦片宽

Memberof

TIFFImageryProvider

Defined in

src/layers/TIFFImageryProvider/index.ts:295

---

tileHeight

• tileHeight: number

瓦片高

Memberof

TIFFImageryProvider

Defined in

src/layers/TIFFImageryProvider/index.ts:302

---

maximumLevel

• maximumLevel: number

获取可请求的最大级别详细信息

Memberof

TIFFImageryProvider

Defined in

src/layers/TIFFImageryProvider/index.ts:309

---

minimumLevel

• minimumLevel: number

获取可请求的最小级别详细信息

Memberof

TIFFImageryProvider

Defined in

src/layers/TIFFImageryProvider/index.ts:316

---

credit

• credit: Credit

授权相关信息

Memberof

TIFFImageryProvider

Defined in

src/layers/TIFFImageryProvider/index.ts:323

---

readyPromise

• readyPromise: Promise<boolean>

取得当提供者准备使用时解析为true的Promise

Memberof

TIFFImageryProvider

Defined in

src/layers/TIFFImageryProvider/index.ts:331

---

hasAlphaChannel

• hasAlphaChannel: boolean

获取一个值，该值指示此图像提供程序提供的图像是否包括 alpha 通道。如果此属性为 false， 则将忽略 alpha 通道(如果存在)。如果此属性为真，则任何没有 alpha 通道的图像 都将被视为它们的 alpha 在任何地方都是 1.0。如果此属性为 false，则减少内存使用和纹理上载时间。

Memberof

TIFFImageryProvider

Defined in

src/layers/TIFFImageryProvider/index.ts:359

Accessors

isDestroyed

• get isDestroyed(): boolean

图层是否销毁

Returns

boolean

Memberof

TIFFImageryProvider

Defined in

src/layers/TIFFImageryProvider/index.ts:401

Methods

fromUrl

▸ fromUrl(url, options?): Promise<TIFFImageryProvider>

加载 tiff 数据

Parameters

Name	Type	Description
url	string | Blob | File	tiff 资源地址
options?	TIFFImageryProviderOptions	相关参数

Returns

Promise<TIFFImageryProvider>

Defined in

src/layers/TIFFImageryProvider/index.ts:635

---

requestImage

▸ requestImage(x, y, z): Promise<ImageBitmap | HTMLCanvasElement | HTMLImageElement>

请求指定的瓦片. 此函数不应该在 TIFFImageryProvider.ready 返回 true 之前调用.

Parameters

Name	Type	Description
x	number	瓦片行号
y	number	瓦片列号
z	number	-

Returns

Promise<ImageBitmap | HTMLCanvasElement | HTMLImageElement>

Defined in

src/layers/TIFFImageryProvider/index.ts:750

---

pickFeatures

▸ pickFeatures(x, y, zoom, longitude, latitude): Promise<ImageryLayerFeatureInfo[]>

拾取瓦片

Parameters

Name	Type	Description
x	number	瓦片 x 坐标
y	number	瓦片 y 坐标
zoom	number	瓦片 zoom 坐标
longitude	number	拾取要素的经度
latitude	number	拾取要素的纬度

Returns

Promise<ImageryLayerFeatureInfo[]>

Defined in

src/layers/TIFFImageryProvider/index.ts:859

---

destroy

▸ destroy(): void

销毁

Returns

void

Defined in

src/layers/TIFFImageryProvider/index.ts:925