GoogleEarthImageryProvider

new GoogleEarthImageryProvider()

Provides tiled imagery using the Google Earth Imagery API. Notes: This imagery provider does not work with the public Google Earth servers. It works with the Google Earth Enterprise Server. By default the Google Earth Enterprise server does not set the Cross-Origin Resource Sharing headers. You can either use a proxy server which adds these headers, or in the /opt/google/gehttpd/conf/gehttpd.conf and add the 'Header set Access-Control-Allow-Origin "*"' option to the '<Directory />' and '<Directory "/opt/google/gehttpd/htdocs">' directives.
Name Type Default Description
options.url String The url of the Google Earth server hosting the imagery.
options.channel Number The channel (id) to be used when requesting data from the server. The channel number can be found by looking at the json file located at: earth.localdomain/default_map/query?request=Json&vars=geeServerDefs The /default_map path may differ depending on your Google Earth Enterprise server configuration. Look for the "id" that is associated with a "ImageryMaps" requestType. There may be more than one id available. Example: { layers: [ { id: 1002, requestType: "ImageryMaps" }, { id: 1007, requestType: "VectorMapsRaster" } ] }
options.path String "/default_map" optional The path of the Google Earth server hosting the imagery.
options.maximumLevel Number 23 optional The maximum level-of-detail supported by the Google Earth Enterprise server.
options.tileDiscardPolicy TileDiscardPolicy optional The policy that determines if a tile is invalid and should be discarded. To ensure that no tiles are discarded, construct and pass a NeverTileDiscardPolicy for this parameter.
options.proxy Proxy optional A proxy to use for requests. This object is expected to have a getURL function which returns the proxied URL, if needed.
Throws:
  • RuntimeError : Could not find layer with channel (id) of options.channel.
  • RuntimeError : Could not find a version in channel (id) options.channel.
  • RuntimeError : Unsupported projection data.projection.
Example:
var google = new Cesium.GoogleEarthImageryProvider({
    url : '//earth.localdomain',
    channel : 1008
});
See:
Source: Scene/GoogleEarthImageryProvider.js, line 96

Members

channel :Number

Gets the imagery channel (id) currently being used.
Source: Scene/GoogleEarthImageryProvider.js, line 259

credit :Credit

Gets the credit to display when this imagery provider is active. Typically this is used to credit the source of the imagery. This function should not be called before GoogleEarthImageryProvider#ready returns true.
Source: Scene/GoogleEarthImageryProvider.js, line 458

defaultGamma :Number

The default ImageryLayer#gamma to use for imagery layers created for this provider. By default, this is set to 1.9. Changing this value after creating an ImageryLayer for this provider will have no effect. Instead, set the layer's ImageryLayer#gamma property.
Default Value: 1.9
Source: Scene/GoogleEarthImageryProvider.js, line 124

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.
Source: Scene/GoogleEarthImageryProvider.js, line 435

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.
Source: Scene/GoogleEarthImageryProvider.js, line 473

maximumLevel :Number

Gets the maximum level-of-detail that can be requested. This function should not be called before GoogleEarthImageryProvider#ready returns true.
Source: Scene/GoogleEarthImageryProvider.js, line 307

minimumLevel :Number

Gets the minimum level-of-detail that can be requested. This function should not be called before GoogleEarthImageryProvider#ready returns true.
Source: Scene/GoogleEarthImageryProvider.js, line 325

path :String

Gets the url path of the data on the Google Earth server.
Source: Scene/GoogleEarthImageryProvider.js, line 237

proxy :Proxy

Gets the proxy used by this provider.
Source: Scene/GoogleEarthImageryProvider.js, line 248

ready :Boolean

Gets a value indicating whether or not the provider is ready for use.
Source: Scene/GoogleEarthImageryProvider.js, line 446

rectangle :Rectangle

Gets the rectangle, in radians, of the imagery provided by this instance. This function should not be called before GoogleEarthImageryProvider#ready returns true.
Source: Scene/GoogleEarthImageryProvider.js, line 396

requestType :String

Gets the type of data that is being requested from the provider. This function should not be called before GoogleEarthImageryProvider#ready returns true.
Source: Scene/GoogleEarthImageryProvider.js, line 379

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. This function should not be called before GoogleEarthImageryProvider#ready returns true.
Source: Scene/GoogleEarthImageryProvider.js, line 416

tileHeight :Number

Gets the height of each tile, in pixels. This function should not be called before GoogleEarthImageryProvider#ready returns true.
Source: Scene/GoogleEarthImageryProvider.js, line 289

tileWidth :Number

Gets the width of each tile, in pixels. This function should not be called before GoogleEarthImageryProvider#ready returns true.
Source: Scene/GoogleEarthImageryProvider.js, line 271

tilingScheme :TilingScheme

Gets the tiling scheme used by this provider. This function should not be called before GoogleEarthImageryProvider#ready returns true.
Source: Scene/GoogleEarthImageryProvider.js, line 343

url :String

Gets the URL of the Google Earth MapServer.
Source: Scene/GoogleEarthImageryProvider.js, line 226

version :Number

Gets the version of the data used by this provider. This function should not be called before GoogleEarthImageryProvider#ready returns true.
Source: Scene/GoogleEarthImageryProvider.js, line 361

Methods

getTileCredits(x, y, level) → Credit[]

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.
Throws:
  • DeveloperError : getTileCredits must not be called before the imagery provider is ready.
Source: Scene/GoogleEarthImageryProvider.js, line 493

requestImage(x, y, level) → Promise

Requests the image for a given tile. This function should not be called before GoogleEarthImageryProvider#ready returns true.
Name Type Description
x Number The tile X coordinate.
y Number The tile Y coordinate.
level Number The tile level.
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. The resolved image may be either an Image or a Canvas DOM object.
Throws:
  • DeveloperError : requestImage must not be called before the imagery provider is ready.
Source: Scene/GoogleEarthImageryProvider.js, line 514