# GoogleEarthEnterpriseMapsProvider

#### new Cesium.GoogleEarthEnterpriseMapsProvider(options)
engine/Source/Scene/GoogleEarthEnterpriseMapsProvider.js 91

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. This provider is for use with 2D Maps API as part of Google Earth Enterprise. For 3D Earth API uses, it is necessary to use `GoogleEarthEnterpriseImageryProvider`

Name | Type | Description
--- | --- | ---
`options` | GoogleEarthEnterpriseMapsProvider.ConstructorOptions | Object describing initialization options

##### 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:

    const google = new Cesium.GoogleEarthEnterpriseMapsProvider({
        url : 'https://earth.localdomain',
        channel : 1008
    });

##### See:

- ArcGisMapServerImageryProvider
- BingMapsImageryProvider
- OpenStreetMapImageryProvider
- SingleTileImageryProvider
- TileMapServiceImageryProvider
- WebMapServiceImageryProvider
- WebMapTileServiceImageryProvider
- UrlTemplateImageryProvider
- Cross-Origin Resource Sharing

### Members

#### static Cesium.GoogleEarthEnterpriseMapsProvider.logoUrl : string
engine/Source/Scene/GoogleEarthEnterpriseMapsProvider.js 738

Gets or sets the URL to the Google Earth logo for display in the credit.

#### readonly channel : number
engine/Source/Scene/GoogleEarthEnterpriseMapsProvider.js 384

Gets the imagery channel (id) currently being used.

#### readonly credit : Credit
engine/Source/Scene/GoogleEarthEnterpriseMapsProvider.js 625

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 `GoogleEarthEnterpriseMapsProvider#ready` returns true.

#### defaultAlpha : number|undefined
engine/Source/Scene/GoogleEarthEnterpriseMapsProvider.js 110

The default alpha blending value of this provider, with 0.0 representing fully transparent and 1.0 representing fully opaque.

Default Value: `undefined`

#### defaultBrightness : number|undefined
engine/Source/Scene/GoogleEarthEnterpriseMapsProvider.js 137

The default brightness of this provider. 1.0 uses the unmodified imagery color. Less than 1.0 makes the imagery darker while greater than 1.0 makes it brighter.

Default Value: `undefined`

#### defaultContrast : number|undefined
engine/Source/Scene/GoogleEarthEnterpriseMapsProvider.js 146

The default contrast of this provider. 1.0 uses the unmodified imagery color. Less than 1.0 reduces the contrast while greater than 1.0 increases it.

Default Value: `undefined`

#### defaultDayAlpha : number|undefined
engine/Source/Scene/GoogleEarthEnterpriseMapsProvider.js 128

The default alpha blending value on the day side of the globe of this provider, with 0.0 representing fully transparent and 1.0 representing fully opaque.

Default Value: `undefined`

#### defaultGamma : number|undefined
engine/Source/Scene/GoogleEarthEnterpriseMapsProvider.js 171

The default gamma correction to apply to this provider. 1.0 uses the unmodified imagery color.

Default Value: `1.9`

#### defaultHue : number|undefined
engine/Source/Scene/GoogleEarthEnterpriseMapsProvider.js 154

The default hue of this provider in radians. 0.0 uses the unmodified imagery color.

Default Value: `undefined`

#### defaultMagnificationFilter : TextureMagnificationFilter
engine/Source/Scene/GoogleEarthEnterpriseMapsProvider.js 187

The default texture magnification filter to apply to this provider.

Default Value: `undefined`

#### defaultMinificationFilter : TextureMinificationFilter
engine/Source/Scene/GoogleEarthEnterpriseMapsProvider.js 179

The default texture minification filter to apply to this provider.

Default Value: `undefined`

#### defaultNightAlpha : number|undefined
engine/Source/Scene/GoogleEarthEnterpriseMapsProvider.js 119

The default alpha blending value on the night side of the globe of this provider, with 0.0 representing fully transparent and 1.0 representing fully opaque.

Default Value: `undefined`

#### defaultSaturation : number|undefined
engine/Source/Scene/GoogleEarthEnterpriseMapsProvider.js 163

The default saturation of this provider. 1.0 uses the unmodified imagery color. Less than 1.0 reduces the saturation while greater than 1.0 increases it.

Default Value: `undefined`

#### readonly errorEvent : Event
engine/Source/Scene/GoogleEarthEnterpriseMapsProvider.js 588

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/GoogleEarthEnterpriseMapsProvider.js 641

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/GoogleEarthEnterpriseMapsProvider.js 439

Gets the maximum level-of-detail that can be requested. This function should not be called before `GoogleEarthEnterpriseMapsProvider#ready` returns true.

#### readonly minimumLevel : number
engine/Source/Scene/GoogleEarthEnterpriseMapsProvider.js 460

Gets the minimum level-of-detail that can be requested. This function should not be called before `GoogleEarthEnterpriseMapsProvider#ready` returns true.

#### readonly path : string
engine/Source/Scene/GoogleEarthEnterpriseMapsProvider.js 360

Gets the url path of the data on the Google Earth server.

#### readonly proxy : Proxy
engine/Source/Scene/GoogleEarthEnterpriseMapsProvider.js 372

Gets the proxy used by this provider.

#### readonly ready : boolean
engine/Source/Scene/GoogleEarthEnterpriseMapsProvider.js 600

Gets a value indicating whether or not the provider is ready for use.

#### readonly readyPromise : Promise.<boolean>
engine/Source/Scene/GoogleEarthEnterpriseMapsProvider.js 612

Gets a promise that resolves to true when the provider is ready for use.

#### readonly rectangle : Rectangle
engine/Source/Scene/GoogleEarthEnterpriseMapsProvider.js 543

Gets the rectangle, in radians, of the imagery provided by this instance. This function should not be called before `GoogleEarthEnterpriseMapsProvider#ready` returns true.

#### readonly requestType : string
engine/Source/Scene/GoogleEarthEnterpriseMapsProvider.js 523

Gets the type of data that is being requested from the provider. This function should not be called before `GoogleEarthEnterpriseMapsProvider#ready` returns true.

#### readonly tileDiscardPolicy : TileDiscardPolicy
engine/Source/Scene/GoogleEarthEnterpriseMapsProvider.js 566

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 `GoogleEarthEnterpriseMapsProvider#ready` returns true.

#### readonly tileHeight : number
engine/Source/Scene/GoogleEarthEnterpriseMapsProvider.js 418

Gets the height of each tile, in pixels. This function should not be called before `GoogleEarthEnterpriseMapsProvider#ready` returns true.

#### readonly tileWidth : number
engine/Source/Scene/GoogleEarthEnterpriseMapsProvider.js 397

Gets the width of each tile, in pixels. This function should not be called before `GoogleEarthEnterpriseMapsProvider#ready` returns true.

#### readonly tilingScheme : TilingScheme
engine/Source/Scene/GoogleEarthEnterpriseMapsProvider.js 481

Gets the tiling scheme used by this provider. This function should not be called before `GoogleEarthEnterpriseMapsProvider#ready` returns true.

#### readonly url : string
engine/Source/Scene/GoogleEarthEnterpriseMapsProvider.js 348

Gets the URL of the Google Earth MapServer.

#### readonly version : number
engine/Source/Scene/GoogleEarthEnterpriseMapsProvider.js 502

Gets the version of the data used by this provider. This function should not be called before `GoogleEarthEnterpriseMapsProvider#ready` returns true.

### Methods

#### getTileCredits(x, y, level) → Array.<Credit>
engine/Source/Scene/GoogleEarthEnterpriseMapsProvider.js 658

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.

#### pickFeatures(x, y, level, longitude, latitude) → undefined
engine/Source/Scene/GoogleEarthEnterpriseMapsProvider.js 720

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

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:

Undefined since picking is not supported.

#### requestImage(x, y, level, request) → Promise.<ImageryTypes>|undefined
engine/Source/Scene/GoogleEarthEnterpriseMapsProvider.js 679

Requests the image for a given tile. This function should not be called before `GoogleEarthEnterpriseMapsProvider#ready` returns true.

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.

##### Throws:

- DeveloperError : `requestImage` must not be called before the imagery provider is ready.

### Type Definitions

#### Cesium.GoogleEarthEnterpriseMapsProvider.ConstructorOptions
engine/Source/Scene/GoogleEarthEnterpriseMapsProvider.js 16

Initialization options for the GoogleEarthEnterpriseMapsProvider constructor

##### Properties:

Name | Type | Attributes | Default | Description
--- | --- | --- | --- | ---
`url` | Resource | string |  |  | The url of the Google Earth server hosting the imagery.
`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" } ] }
`path` | string | <optional> | "/default_map" | The path of the Google Earth server hosting the imagery.
`maximumLevel` | number | <optional> |  | The maximum level-of-detail supported by the Google Earth Enterprise server, or undefined if there is no limit.
`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.
`ellipsoid` | Ellipsoid | <optional> |  | The ellipsoid. If not specified, the WGS84 ellipsoid is used.

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