# GeographicTilingScheme

#### new Cesium.GeographicTilingScheme(options)
engine/Source/Core/GeographicTilingScheme.js 27

A tiling scheme for geometry referenced to a simple `GeographicProjection` where longitude and latitude are directly mapped to X and Y. This projection is commonly known as geographic, equirectangular, equidistant cylindrical, or plate carrée.

Name | Type | Description
--- | --- | ---
`options` | object | optional Object with the following properties:
Name | Type | Default | Description
--- | --- | --- | ---
`ellipsoid` | Ellipsoid | `Ellipsoid.default` | optional The ellipsoid whose surface is being tiled. Defaults to the default ellipsoid.
`rectangle` | Rectangle | `Rectangle.MAX_VALUE` | optional The rectangle, in radians, covered by the tiling scheme.
`numberOfLevelZeroTilesX` | number | `2` | optional The number of tiles in the X direction at level zero of the tile tree.
`numberOfLevelZeroTilesY` | number | `1` | optional The number of tiles in the Y direction at level zero of the tile tree.

### Members

#### ellipsoid : Ellipsoid
engine/Source/Core/GeographicTilingScheme.js 43

Gets the ellipsoid that is tiled by this tiling scheme.

#### projection : MapProjection
engine/Source/Core/GeographicTilingScheme.js 65

Gets the map projection used by this tiling scheme.

#### rectangle : Rectangle
engine/Source/Core/GeographicTilingScheme.js 54

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

### Methods

#### getNumberOfXTilesAtLevel(level) → number
engine/Source/Core/GeographicTilingScheme.js 78

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
engine/Source/Core/GeographicTilingScheme.js 88

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
engine/Source/Core/GeographicTilingScheme.js 204

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
engine/Source/Core/GeographicTilingScheme.js 102

Transforms a 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
engine/Source/Core/GeographicTilingScheme.js 138

Converts tile x, y coordinates and level to a 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
engine/Source/Core/GeographicTilingScheme.js 163

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.

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