Class: TileCoordinatesImageryProvider

TileCoordinatesImageryProvider

new TileCoordinatesImageryProvider(optionsopt)

An ImageryProvider that draws a box around every rendered tile in the tiling scheme, and draws a label inside it indicating the X, Y, Level coordinates of the tile. This is mostly useful for debugging terrain and imagery rendering problems.
Parameters:
Name Type Attributes Description
options Object <optional>
 Object with the following properties:
Properties
Name Type Attributes Default Description
tilingScheme TilingScheme <optional>
 new GeographicTilingScheme() The tiling scheme for which to draw tiles.
ellipsoid Ellipsoid <optional>
 The ellipsoid. If the tilingScheme is specified, this parameter is ignored and the tiling scheme's ellipsoid is used instead. If neither parameter is specified, the WGS84 ellipsoid is used.
color Color <optional>
 Color.YELLOW The color to draw the tile box and label.
tileWidth Number <optional>
 256 The width of the tile for level-of-detail selection purposes.
tileHeight Number <optional>
 256 The height of the tile for level-of-detail selection purposes.
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Members

(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. This function should not be called before TileCoordinatesImageryProvider#ready returns true.
Type:
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(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.
Type:
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(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. Setting this property to false reduces memory usage and texture upload time.
Type:
  • Boolean
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(readonly) maximumLevel :Number

Gets the maximum level-of-detail that can be requested. This function should not be called before TileCoordinatesImageryProvider#ready returns true.
Type:
  • Number
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(readonly) minimumLevel :Number

Gets the minimum level-of-detail that can be requested. This function should not be called before TileCoordinatesImageryProvider#ready returns true.
Type:
  • Number
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(readonly) proxy :Proxy

Gets the proxy used by this provider.
Type:
  • Proxy
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(readonly) ready :Boolean

Gets a value indicating whether or not the provider is ready for use.
Type:
  • Boolean
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(readonly) readyPromise :Promise.<Boolean>

Gets a promise that resolves to true when the provider is ready for use.
Type:
  • Promise.<Boolean>
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(readonly) rectangle :Rectangle

Gets the rectangle, in radians, of the imagery provided by this instance. This function should not be called before TileCoordinatesImageryProvider#ready returns true.
Type:
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(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. This function should not be called before TileCoordinatesImageryProvider#ready returns true.
Type:
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(readonly) tileHeight :Number

Gets the height of each tile, in pixels. This function should not be called before TileCoordinatesImageryProvider#ready returns true.
Type:
  • Number
Source:

(readonly) tileWidth :Number

Gets the width of each tile, in pixels. This function should not be called before TileCoordinatesImageryProvider#ready returns true.
Type:
  • Number
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(readonly) tilingScheme :TilingScheme

Gets the tiling scheme used by this provider. This function should not be called before TileCoordinatesImageryProvider#ready returns true.
Type:
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Methods

getTileCredits(x, y, level) → {Array.<Credit>}

Gets the credits to be displayed when a given tile is displayed.
Parameters:
Name Type Description
x Number The tile X coordinate.
y Number The tile Y coordinate.
level Number The tile level;
Source:
Throws:
getTileCredits must not be called before the imagery provider is ready.
Type
DeveloperError
Returns:
The credits to be displayed when the tile is displayed.
Type
Array.<Credit>

pickFeatures(x, y, level, longitude, latitude) → {Promise.<Array.<ImageryLayerFeatureInfo>>|undefined}

Picking features is not currently supported by this imagery provider, so this function simply returns undefined.
Parameters:
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.
Source:
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.
Type
Promise.<Array.<ImageryLayerFeatureInfo>> | undefined

requestImage(x, y, level) → {Promise.<(Image|Canvas)>|undefined}

Requests the image for a given tile. This function should not be called before TileCoordinatesImageryProvider#ready returns true.
Parameters:
Name Type Description
x Number The tile X coordinate.
y Number The tile Y coordinate.
level Number The tile level.
Source:
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.
Type
Promise.<(Image|Canvas)> | undefined