KBE3D / KBCore / Cesium / WebMercatorTilingScheme

类: WebMercatorTilingScheme

A tiling scheme for geometry referenced to a WebMercatorProjection, EPSG:3857. This is the tiling scheme used by Google Maps, Microsoft Bing Maps, and most of ESRI ArcGIS Online.

参数

Object with the following properties:

参数

The ellipsoid whose surface is being tiled. Defaults to the default ellipsoid.

参数

The number of tiles in the X direction at level zero of the tile tree.

参数

The number of tiles in the Y direction at level zero of the tile tree.

参数

The southwest corner of the rectangle covered by the tiling scheme, in meters. If this parameter or rectangleNortheastInMeters is not specified, the entire globe is covered in the longitude direction and an equal distance is covered in the latitude direction, resulting in a square projection.

参数

The northeast corner of the rectangle covered by the tiling scheme, in meters. If this parameter or rectangleSouthwestInMeters is not specified, the entire globe is covered in the longitude direction and an equal distance is covered in the latitude direction, resulting in a square projection.

属性

ellipsoid

ellipsoid: Ellipsoid

Gets the ellipsoid that is tiled by this tiling scheme.

---

rectangle

rectangle: Rectangle

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

---

projection

projection: MapProjection

Gets the map projection used by this tiling scheme.

方法

getNumberOfXTilesAtLevel()

getNumberOfXTilesAtLevel(level: number): number

Gets the total number of tiles in the X direction at a specified level-of-detail.

参数

level

number

The level-of-detail.

返回

number

The number of tiles in the X direction at the given level.

---

getNumberOfYTilesAtLevel()

getNumberOfYTilesAtLevel(level: number): number

Gets the total number of tiles in the Y direction at a specified level-of-detail.

参数

level

number

The level-of-detail.

返回

number

The number of tiles in the Y direction at the given level.

---

rectangleToNativeRectangle()

rectangleToNativeRectangle(rectangle: Rectangle, result?: Rectangle): Rectangle

Transforms a rectangle specified in geodetic radians to the native coordinate system of this tiling scheme.

参数

rectangle

Rectangle

The rectangle to transform.

result?

Rectangle

The instance to which to copy the result, or undefined if a new instance should be created.

返回

Rectangle

The specified 'result', or a new object containing the native rectangle if 'result' is undefined.

---

tileXYToNativeRectangle()

tileXYToNativeRectangle(x: number, y: number, level: number, result?: any): Rectangle

Converts tile x, y coordinates and level to a rectangle expressed in the native coordinates of the tiling scheme.

参数

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?

any

The instance to which to copy the result, or undefined if a new instance should be created.

返回

Rectangle

The specified 'result', or a new object containing the rectangle if 'result' is undefined.

---

tileXYToRectangle()

tileXYToRectangle(x: number, y: number, level: number, result?: any): Rectangle

Converts tile x, y coordinates and level to a cartographic rectangle in radians.

参数

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?

any

The instance to which to copy the result, or undefined if a new instance should be created.

返回

Rectangle

The specified 'result', or a new object containing the rectangle if 'result' is undefined.

---

positionToTileXY()

positionToTileXY(position: Cartographic, level: number, result?: Cartesian2): Cartesian2

Calculates the tile x, y coordinates of the tile containing a given cartographic position.

参数

position

Cartographic

The position.

level

number

The tile level-of-detail. Zero is the least detailed.

result?

Cartesian2

The instance to which to copy the result, or undefined if a new instance should be created.

返回

Cartesian2

The specified 'result', or a new object containing the tile x, y coordinates if 'result' is undefined.

构造函数

构造函数

new WebMercatorTilingScheme(options?: { ellipsoid?: Ellipsoid; numberOfLevelZeroTilesX?: number; numberOfLevelZeroTilesY?: number; rectangleSouthwestInMeters?: Cartesian2; rectangleNortheastInMeters?: Cartesian2; }): WebMercatorTilingScheme

参数

options?

ellipsoid?

Ellipsoid

numberOfLevelZeroTilesX?

number

numberOfLevelZeroTilesY?

number

rectangleSouthwestInMeters?

Cartesian2

rectangleNortheastInMeters?

Cartesian2

返回

WebMercatorTilingScheme