# GeographicTilingScheme

#### new Cesium.GeographicTilingScheme(options)
Core/GeographicTilingScheme.js 40

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.WGS84` | optional The ellipsoid whose surface is being tiled. Defaults to the WGS84 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
Core/GeographicTilingScheme.js 76

Gets the ellipsoid that is tiled by this tiling scheme.

#### projection : MapProjection
Core/GeographicTilingScheme.js 98

Gets the map projection used by this tiling scheme.

#### rectangle : Rectangle
Core/GeographicTilingScheme.js 87

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

### Methods

#### getNumberOfXTilesAtLevel(level) → Number
Core/GeographicTilingScheme.js 111

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
Core/GeographicTilingScheme.js 129

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
Core/GeographicTilingScheme.js 285

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
Core/GeographicTilingScheme.js 151

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
Core/GeographicTilingScheme.js 184

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
Core/GeographicTilingScheme.js 204

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.