KBE3D / KBCore / Cesium / WebMapTileServiceImageryProvider

类: WebMapTileServiceImageryProvider

Provides tiled imagery served by WMTS 1.0.0

compliant servers. This provider supports HTTP KVP-encoded and RESTful GetTile requests, but does not yet support the SOAP encoding.

Examples

// Example 1. USGS shaded relief tiles (KVP)
const shadedRelief1 = new Cesium.WebMapTileServiceImageryProvider({
    url : 'https://basemap.nationalmap.gov/arcgis/rest/services/USGSShadedReliefOnly/MapServer/WMTS',
    layer : 'USGSShadedReliefOnly',
    style : 'default',
    format : 'image/jpeg',
    tileMatrixSetID : 'default028mm',
    // tileMatrixLabels : ['default028mm:0', 'default028mm:1', 'default028mm:2' ...],
    maximumLevel: 19,
    credit : new Cesium.Credit('U. S. Geological Survey')
});
viewer.imageryLayers.addImageryProvider(shadedRelief1);

// Example 2. USGS shaded relief tiles (RESTful)
const shadedRelief2 = new Cesium.WebMapTileServiceImageryProvider({
    url : 'https://basemap.nationalmap.gov/arcgis/rest/services/USGSShadedReliefOnly/MapServer/WMTS/tile/1.0.0/USGSShadedReliefOnly/{Style}/{TileMatrixSet}/{TileMatrix}/{TileRow}/{TileCol}.jpg',
    layer : 'USGSShadedReliefOnly',
    style : 'default',
    format : 'image/jpeg',
    tileMatrixSetID : 'default028mm',
    maximumLevel: 19,
    credit : new Cesium.Credit('U. S. Geological Survey')
});
viewer.imageryLayers.addImageryProvider(shadedRelief2);

// Example 3. NASA time dynamic weather data (RESTful)
const times = Cesium.TimeIntervalCollection.fromIso8601({
    iso8601: '2015-07-30/2017-06-16/P1D',
    dataCallback: function dataCallback(interval, index) {
        return {
            Time: Cesium.JulianDate.toIso8601(interval.start)
        };
    }
});
const weather = new Cesium.WebMapTileServiceImageryProvider({
    url : 'https://gibs.earthdata.nasa.gov/wmts/epsg4326/best/AMSR2_Snow_Water_Equivalent/default/{Time}/{TileMatrixSet}/{TileMatrix}/{TileRow}/{TileCol}.png',
    layer : 'AMSR2_Snow_Water_Equivalent',
    style : 'default',
    tileMatrixSetID : '2km',
    maximumLevel : 5,
    format : 'image/png',
    clock: clock,
    times: times,
    credit : new Cesium.Credit('NASA Global Imagery Browse Services for EOSDIS')
});
viewer.imageryLayers.addImageryProvider(weather);

参数

Object describing initialization options

属性

url

readonly url: string

Gets the URL of the service hosting the imagery.

---

proxy

readonly proxy: Proxy

Gets the proxy used by this provider.

---

tileWidth

readonly tileWidth: number

Gets the width of each tile, in pixels.

---

tileHeight

readonly tileHeight: number

Gets the height of each tile, in pixels.

---

maximumLevel

readonly maximumLevel: number | undefined

Gets the maximum level-of-detail that can be requested.

---

minimumLevel

readonly minimumLevel: number

Gets the minimum level-of-detail that can be requested.

---

tilingScheme

readonly tilingScheme: TilingScheme

Gets the tiling scheme used by this provider.

---

rectangle

readonly rectangle: Rectangle

Gets the rectangle, in radians, of the imagery provided by this instance.

---

tileDiscardPolicy

readonly tileDiscardPolicy: TileDiscardPolicy

Gets the tile discard policy. If not undefined, the discard policy is responsible for filtering out "missing" tiles via its shouldDiscardImage function. If this function returns undefined, no tiles are filtered.

---

errorEvent

readonly errorEvent: Event

Gets an event that is raised when the imagery provider encounters an asynchronous error. By subscribing to the event, you will be notified of the error and can potentially recover from it. Event listeners are passed an instance of TileProviderError.

---

format

readonly format: string

Gets the mime type of images returned by this imagery provider.

---

credit

readonly credit: Credit

Gets the credit to display when this imagery provider is active. Typically this is used to credit the source of the imagery.

---

hasAlphaChannel

readonly hasAlphaChannel: boolean

Gets a value indicating whether or not the images provided by this imagery provider include an alpha channel. If this property is false, an alpha channel, if present, will be ignored. If this property is true, any images without an alpha channel will be treated as if their alpha is 1.0 everywhere. When this property is false, memory usage and texture upload time are reduced.

---

clock

clock: Clock

Gets or sets a clock that is used to get keep the time used for time dynamic parameters.

---

times

times: TimeIntervalCollection

Gets or sets a time interval collection that is used to get time dynamic parameters. The data of each TimeInterval is an object containing the keys and values of the properties that are used during tile requests.

---

dimensions

dimensions: any

Gets or sets an object that contains static dimensions and their values.

方法

getTileCredits()

getTileCredits(x: number, y: number, level: number): Credit[]

Gets the credits to be displayed when a given tile is displayed.

参数

x

number

The tile X coordinate.

y

number

The tile Y coordinate.

level

number

The tile level;

返回

Credit[]

The credits to be displayed when the tile is displayed.

---

requestImage()

requestImage(x: number, y: number, level: number, request?: Request): Promise<ImageryTypes> | undefined

Requests the image for a given tile.

参数

x

number

The tile X coordinate.

y

number

The tile Y coordinate.

level

number

The tile level.

request?

Request

The request object. Intended for internal use only.

返回

Promise<ImageryTypes> | undefined

A promise for the image that will resolve when the image is available, or undefined if there are too many active requests to the server, and the request should be retried later.

---

pickFeatures()

pickFeatures(x: number, y: number, level: number, longitude: number, latitude: number): undefined

Picking features is not currently supported by this imagery provider, so this function simply returns undefined.

参数

x

number

The tile X coordinate.

y

number

The tile Y coordinate.

level

number

The tile level.

longitude

number

The longitude at which to pick features.

latitude

number

The latitude at which to pick features.

返回

undefined

Undefined since picking is not supported.

构造函数

构造函数

new WebMapTileServiceImageryProvider(options: ConstructorOptions): WebMapTileServiceImageryProvider

参数

options

ConstructorOptions

返回

WebMapTileServiceImageryProvider