EllipsoidTerrainProvider

EllipsoidTerrainProvider

new

A very simple TerrainProvider that produces geometry by tessellating an ellipsoidal surface.

Parameters:
Name Type Argument Description
description.tilingScheme TilingScheme <optional>
The tiling scheme specifying how the ellipsoidal surface is broken into tiles. If this parameter is not provided, a GeographicTilingScheme is used.
description.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.
See:
Source:

Methods

Gets an event that is raised when the terrain 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.

Returns:
Event The event.

Gets the maximum geometric error allowed in a tile at a given level.

Parameters:
Name Type Description
level Number The tile level for which to get the maximum geometric error.
Returns:
Number The maximum geometric error.

Gets the logo to display when this terrain provider is active. Typically this is used to credit the source of the terrain. This function should not be called before EllipsoidTerrainProvider#isReady returns true.

Throws:
DeveloperError : getLogo must not be called before the terrain provider is ready.
Returns:
Image | Canvas A canvas or image containing the log to display, or undefined if there is no logo.

Gets the tiling scheme used by this provider. This function should not be called before EllipsoidTerrainProvider#isReady returns true.

Throws:
DeveloperError : getTilingScheme must not be called before the terrain provider is ready.
Returns:
GeographicTilingScheme The tiling scheme.
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Gets a value indicating whether or not the provider includes a water mask. The water mask indicates which areas of the globe are water rather than land, so they can be rendered as a reflective surface with animated waves.

Returns:
Boolean True if the provider has a water mask; otherwise, false.

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

Returns:
Boolean True if the provider is ready to use; otherwise, false.

Requests the geometry for a given tile. This function should not be called before TerrainProvider#isReady returns true. The result includes terrain data and indicates that all child tiles are available.

Parameters:
Name Type Argument Default Description
x Number The X coordinate of the tile for which to request geometry.
y Number The Y coordinate of the tile for which to request geometry.
level Number The level of the tile for which to request geometry.
throttleRequests Boolean <optional>
true True if the number of simultaneous requests should be limited, or false if the request should be initiated regardless of the number of requests already in progress.
Returns:
Promise | TerrainData A promise for the requested geometry. If this method returns undefined instead of a promise, it is an indication that too many requests are already pending and the request will be retried later.