GoogleEarthEnterpriseMapsProvider

new Cesium.GoogleEarthEnterpriseMapsProvider(options)

To construct a GoogleEarthEnterpriseMapsProvider, call GoogleEarthEnterpriseImageryProvider.fromUrl. Do not call the constructor directly.
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
参数名称 类型 描述信息
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.
使用示例:
const google = await Cesium.GoogleEarthEnterpriseMapsProvider.fromUrl("https://earth.localdomain", 1008);
参考:

成员(属性)

static Cesium.GoogleEarthEnterpriseMapsProvider.logoUrl : string

Gets or sets the URL to the Google Earth logo for display in the credit.
Gets the imagery channel (id) currently being used.
Gets the credit to display when this imagery provider is active. Typically this is used to credit the source of the imagery.
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.
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

Gets the maximum level-of-detail that can be requested.
Gets the minimum level-of-detail that can be requested.
Gets the url path of the data on the Google Earth server.
Gets the proxy used by this provider.
Gets the rectangle, in radians, of the imagery provided by this instance.
Gets the type of data that is being requested from the provider.
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.
Gets the height of each tile, in pixels.
Gets the width of each tile, in pixels.
Gets the tiling scheme used by this provider.
Gets the URL of the Google Earth MapServer.
Gets the version of the data used by this provider.

方法

static Cesium.GoogleEarthEnterpriseMapsProvider.fromUrl(url, options)Promise.<GoogleEarthEnterpriseMapsProvider>

Creates a tiled imagery provider using the Google Earth Imagery API.
参数名称 类型 描述信息
url Resource | String The url of the Google Earth server hosting the imagery.
options GoogleEarthEnterpriseMapsProvider.ConstructorOptions 可选 Object describing initialization options
返回值:
The created GoogleEarthEnterpriseMapsProvider.
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.
使用示例:
const google = await Cesium.GoogleEarthEnterpriseMapsProvider.fromUrl("https://earth.localdomain", 1008);
Gets the credits to be displayed when a given tile is displayed.
参数名称 类型 描述信息
x number The tile X coordinate.
y number The tile Y coordinate.
level number The tile level;
返回值:
The credits to be displayed when the tile is displayed.

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

Picking features is not currently supported by this imagery provider, so this function simply returns undefined.
参数名称 类型 描述信息
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.
返回值:
Undefined since picking is not supported.

requestImage(x, y, level, request)Promise.<ImageryTypes>|undefined

Requests the image for a given tile.
参数名称 类型 描述信息
x number The tile X coordinate.
y number The tile Y coordinate.
level number The tile level.
request Request 可选 The request object. Intended for internal use only.
返回值:
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.

定义的类型

Cesium.GoogleEarthEnterpriseMapsProvider.ConstructorOptions

Initialization options for the GoogleEarthEnterpriseMapsProvider constructor
属性:
属性名称 类型 可选 默认值 描述信息
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 <可选>
"/default_map" The path of the Google Earth server hosting the imagery.
maximumLevel number <可选>
The maximum level-of-detail supported by the Google Earth Enterprise server, or undefined if there is no limit.
tileDiscardPolicy TileDiscardPolicy <可选>
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 <可选>
The ellipsoid. If not specified, the WGS84 ellipsoid is used.