# TileCoordinatesImageryProvider

#### new Cesium.TileCoordinatesImageryProvider(options)
Scene/TileCoordinatesImageryProvider.js 32

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.

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

### Members

#### readonly credit : Credit
Scene/TileCoordinatesImageryProvider.js 282

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.

#### defaultAlpha : Number|undefined
Scene/TileCoordinatesImageryProvider.js 51

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
Scene/TileCoordinatesImageryProvider.js 78

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
Scene/TileCoordinatesImageryProvider.js 87

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
Scene/TileCoordinatesImageryProvider.js 69

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
Scene/TileCoordinatesImageryProvider.js 112

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

Default Value: `undefined`

#### defaultHue : Number|undefined
Scene/TileCoordinatesImageryProvider.js 95

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

Default Value: `undefined`

#### defaultMagnificationFilter : TextureMagnificationFilter
Scene/TileCoordinatesImageryProvider.js 128

The default texture magnification filter to apply to this provider.

Default Value: `undefined`

#### defaultMinificationFilter : TextureMinificationFilter
Scene/TileCoordinatesImageryProvider.js 120

The default texture minification filter to apply to this provider.

Default Value: `undefined`

#### defaultNightAlpha : Number|undefined
Scene/TileCoordinatesImageryProvider.js 60

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
Scene/TileCoordinatesImageryProvider.js 104

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
Scene/TileCoordinatesImageryProvider.js 245

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
Scene/TileCoordinatesImageryProvider.js 298

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.

#### readonly maximumLevel : Number|undefined
Scene/TileCoordinatesImageryProvider.js 177

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

#### readonly minimumLevel : Number
Scene/TileCoordinatesImageryProvider.js 190

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

#### readonly proxy : Proxy
Scene/TileCoordinatesImageryProvider.js 138

Gets the proxy used by this provider.

#### readonly ready : Boolean
Scene/TileCoordinatesImageryProvider.js 257

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

#### readonly readyPromise : Promise.<Boolean>
Scene/TileCoordinatesImageryProvider.js 269

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

#### readonly rectangle : Rectangle
Scene/TileCoordinatesImageryProvider.js 216

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

#### readonly tileDiscardPolicy : TileDiscardPolicy
Scene/TileCoordinatesImageryProvider.js 231

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.

#### readonly tileHeight : Number
Scene/TileCoordinatesImageryProvider.js 164

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

#### readonly tileWidth : Number
Scene/TileCoordinatesImageryProvider.js 151

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

#### readonly tilingScheme : TilingScheme
Scene/TileCoordinatesImageryProvider.js 203

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

### Methods

#### getTileCredits(x, y, level) → Array.<Credit>
Scene/TileCoordinatesImageryProvider.js 315

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) → Promise.<Array.<ImageryLayerFeatureInfo>>|undefined
Scene/TileCoordinatesImageryProvider.js 377

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:

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.<(HTMLImageElement|HTMLCanvasElement)>|undefined
Scene/TileCoordinatesImageryProvider.js 336

Requests the image for a given tile. This function should not be called before `TileCoordinatesImageryProvider#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. The resolved image may be either an Image or a Canvas DOM object.

### Type Definitions

#### Cesium.TileCoordinatesImageryProvider.ConstructorOptions
Scene/TileCoordinatesImageryProvider.js 8

Initialization options for the TileCoordinatesImageryProvider constructor

##### 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.