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.
See:
Source: Core/TilingScheme.js, line 23

Members

ellipsoid :Ellipsoid

Gets the ellipsoid that is tiled by the tiling scheme.
Source: Core/TilingScheme.js, line 33

projection :Projection

Gets the map projection used by the tiling scheme.
Source: Core/TilingScheme.js, line 52

rectangle :Rectangle

Gets the rectangle, in radians, covered by this tiling scheme.
Source: Core/TilingScheme.js, line 42

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.
Source: Core/TilingScheme.js, line 64

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.
Source: Core/TilingScheme.js, line 73

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 Cartesian 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.
Source: Core/TilingScheme.js, line 129

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.
Source: Core/TilingScheme.js, line 86

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.
Source: Core/TilingScheme.js, line 101

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.
Source: Core/TilingScheme.js, line 115