IonImageryProvider

new Cesium.IonImageryProvider(options)
engine/Source/Scene/IonImageryProvider.js 84

To construct a IonImageryProvider, call IonImageryProvider.fromAssetId. Do not call the constructor directly.
Provides tiled imagery using the Cesium ion REST API.
Name Type Description
options IonImageryProvider.ConstructorOptions optional Object describing initialization options
Example:
const imageryLayer = Cesium.ImageryLayer.fromProviderAsync(Cesium.IonImageryProvider.fromAssetId(3812));
viewer.imageryLayers.add(imageryLayer);
See:

Members

readonly credit : Credit
engine/Source/Scene/IonImageryProvider.js 214

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

readonly errorEvent : Event
engine/Source/Scene/IonImageryProvider.js 201

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.

readonly hasAlphaChannel : boolean
engine/Source/Scene/IonImageryProvider.js 230

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.

readonly maximumLevel : number|undefined
engine/Source/Scene/IonImageryProvider.js 145

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

readonly minimumLevel : number
engine/Source/Scene/IonImageryProvider.js 161

Gets the minimum level-of-detail that can be requested. Generally, a minimum level should only be used when the rectangle of the imagery is small enough that the number of tiles at the minimum level is small. An imagery provider with more than a few tiles at the minimum level will lead to rendering problems.

readonly proxy : Proxy
engine/Source/Scene/IonImageryProvider.js 243

Gets the proxy used by this provider.
Default Value: undefined

readonly rectangle : Rectangle
engine/Source/Scene/IonImageryProvider.js 109

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

readonly tileDiscardPolicy : TileDiscardPolicy
engine/Source/Scene/IonImageryProvider.js 187

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.

readonly tileHeight : number
engine/Source/Scene/IonImageryProvider.js 133

Gets the height of each tile, in pixels.

readonly tileWidth : number
engine/Source/Scene/IonImageryProvider.js 121

Gets the width of each tile, in pixels.

readonly tilingScheme : TilingScheme
engine/Source/Scene/IonImageryProvider.js 173

Gets the tiling scheme used by the provider.

Methods

static Cesium.IonImageryProvider.fromAssetId(assetId, options) → Promise.<IonImageryProvider>
engine/Source/Scene/IonImageryProvider.js 264

Creates a provider for tiled imagery using the Cesium ion REST API.
Name Type Description
assetId Number An ion imagery asset ID.
options IonImageryProvider.ConstructorOptions Object describing initialization options.
Returns:
A promise which resolves to the created IonImageryProvider.
Throws:
Example:
const imageryLayer = Cesium.ImageryLayer.fromProviderAsync(Cesium.IonImageryProvider.fromAssetId(3812));
viewer.imageryLayers.add(imageryLayer);

getTileCredits(x, y, level) → Array.<Credit>
engine/Source/Scene/IonImageryProvider.js 342

Gets the credits to be displayed when a given tile is displayed.
Name Type Description
x number The tile X coordinate.
y number The tile Y coordinate.
level number The tile level;
Returns:
The credits to be displayed when the tile is displayed.

pickFeatures(x, y, level, longitude, latitude) → Promise.<Array.<ImageryLayerFeatureInfo>>|undefined
engine/Source/Scene/IonImageryProvider.js 382

Asynchronously determines what features, if any, are located at a given longitude and latitude within a tile. This function is optional, so it may not exist on all ImageryProviders.
Name Type Description
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.
Returns:
A promise for the picked features that will resolve when the asynchronous picking completes. The resolved value is an array of ImageryLayerFeatureInfo instances. The array may be empty if no features are found at the given location. It may also be undefined if picking is not supported.

requestImage(x, y, level, request) → Promise.<ImageryTypes>|undefined
engine/Source/Scene/IonImageryProvider.js 362

Requests the image for a given tile.
Name Type Description
x number The tile X coordinate.
y number The tile Y coordinate.
level number The tile level.
request Request optional The request object. Intended for internal use only.
Returns:
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.

Type Definitions

Cesium.IonImageryProvider.ConstructorOptions
engine/Source/Scene/IonImageryProvider.js 57

Initialization options for the TileMapServiceImageryProvider constructor
Properties:
Name Type Attributes Default Description
accessToken string <optional>
 Ion.defaultAccessToken The access token to use.
server string | Resource <optional>
 Ion.defaultServer The resource to the Cesium ion API server.
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