# TilingScheme

#### new TilingScheme()

A tiling scheme for geometry or imagery on the surface of an ellipsoid. At level-of-detail zero, the coarsest, least-detailed level, the number of tiles is configurable. At level of detail one, each of the level zero tiles has four children, two in each direction. At level of detail two, each of the level one tiles has four children, two in each direction. This continues for as many levels as are present in the geometry or imagery source.

### Members

#### ellipsoid :Ellipsoid

Gets the ellipsoid that is tiled by the tiling scheme.

#### projection :MapProjection

Gets the map projection used by the tiling scheme.

#### rectangle :Rectangle

Gets the rectangle, in radians, covered by this tiling scheme.

### Methods

#### getNumberOfXTilesAtLevel(level) → Number

Gets the total number of tiles in the X direction at a specified level-of-detail.
Name Type Description
`level` Number The level-of-detail.
##### Returns:
The number of tiles in the X direction at the given level.

#### getNumberOfYTilesAtLevel(level) → Number

Gets the total number of tiles in the Y direction at a specified level-of-detail.
Name Type Description
`level` Number The level-of-detail.
##### Returns:
The number of tiles in the Y direction at the given level.

#### positionToTileXY(position, level, result) → Cartesian2

Calculates the tile x, y coordinates of the tile containing a given cartographic position.
Name Type Description
`position` Cartographic The position.
`level` Number The tile level-of-detail. Zero is the least detailed.
`result` Cartesian2 optional The instance to which to copy the result, or undefined if a new instance should be created.
##### Returns:
The specified 'result', or a new object containing the tile x, y coordinates if 'result' is undefined.

#### rectangleToNativeRectangle(rectangle, result) → Rectangle

Transforms an rectangle specified in geodetic radians to the native coordinate system of this tiling scheme.
Name Type Description
`rectangle` Rectangle The rectangle to transform.
`result` Rectangle optional The instance to which to copy the result, or undefined if a new instance should be created.
##### Returns:
The specified 'result', or a new object containing the native rectangle if 'result' is undefined.

#### tileXYToNativeRectangle(x, y, level, result) → Rectangle

Converts tile x, y coordinates and level to an rectangle expressed in the native coordinates of the tiling scheme.
Name Type Description
`x` Number The integer x coordinate of the tile.
`y` Number The integer y coordinate of the tile.
`level` Number The tile level-of-detail. Zero is the least detailed.
`result` Object optional The instance to which to copy the result, or undefined if a new instance should be created.
##### Returns:
The specified 'result', or a new object containing the rectangle if 'result' is undefined.

#### tileXYToRectangle(x, y, level, result) → Rectangle

Converts tile x, y coordinates and level to a cartographic rectangle in radians.
Name Type Description
`x` Number The integer x coordinate of the tile.
`y` Number The integer y coordinate of the tile.
`level` Number The tile level-of-detail. Zero is the least detailed.
`result` Object optional The instance to which to copy the result, or undefined if a new instance should be created.
##### Returns:
The specified 'result', or a new object containing the rectangle if 'result' is undefined.