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.
| 参数名称 | 类型 | 描述信息 |
|---|---|---|
options |
TileCoordinatesImageryProvider.ConstructorOptions | 可选 Object describing initialization options |
成员(属性)
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.
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.
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.
Gets the maximum level-of-detail that can be requested.
Gets the minimum level-of-detail that can be requested.
readonly proxy : Proxy
Gets the proxy used by this provider.
readonly rectangle : Rectangle
Gets the rectangle, in radians, of the imagery provided by this instance.
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.
Gets the height of each tile, in pixels.
Gets the width of each tile, in pixels.
readonly tilingScheme : TilingScheme
Gets the tiling scheme used by this provider.
方法
getTileCredits(x, y, level) → Array.<Credit>
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.
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.
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:
The resolved image as a Canvas DOM object.
定义的类型
Initialization options for the TileCoordinatesImageryProvider constructor
属性:
| 属性名称 | 类型 | 可选 | 默认值 | 描述信息 |
|---|---|---|---|---|
tilingScheme |
TilingScheme |
<可选> |
new GeographicTilingScheme() | The tiling scheme for which to draw tiles. |
ellipsoid |
Ellipsoid |
<可选> |
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 |
<可选> |
Color.YELLOW | The color to draw the tile box and label. |
tileWidth |
number |
<可选> |
256 | The width of the tile for level-of-detail selection purposes. |
tileHeight |
number |
<可选> |
256 | The height of the tile for level-of-detail selection purposes. |