Class: GeographicTilingScheme

GeographicTilingScheme

new GeographicTilingScheme(optionsopt)

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.
Parameters:
Name Type Attributes Description
options Object <optional>
 Object with the following properties:
Properties
Name Type Attributes Default Description
ellipsoid Ellipsoid <optional>
 Ellipsoid.WGS84 The ellipsoid whose surface is being tiled. Defaults to the WGS84 ellipsoid.
rectangle Rectangle <optional>
 Rectangle.MAX_VALUE The rectangle, in radians, covered by the tiling scheme.
numberOfLevelZeroTilesX Number <optional>
 2 The number of tiles in the X direction at level zero of the tile tree.
numberOfLevelZeroTilesY Number <optional>
 1 The number of tiles in the Y direction at level zero of the tile tree.
Source:

Members

ellipsoid :Ellipsoid

Gets the ellipsoid that is tiled by this tiling scheme.
Type:
Source:

projection :MapProjection

Gets the map projection used by this tiling scheme.
Type:
Source:

rectangle :Rectangle

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

Methods

getNumberOfXTilesAtLevel(level) → {Number}

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

getNumberOfYTilesAtLevel(level) → {Number}

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

positionToTileXY(position, level, resultopt) → {Cartesian2}

Calculates the tile x, y coordinates of the tile containing a given cartographic position.
Parameters:
Name Type Attributes 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.
Source:
Returns:
The specified 'result', or a new object containing the tile x, y coordinates if 'result' is undefined.
Type
Cartesian2

rectangleToNativeRectangle(rectangle, resultopt) → {Rectangle}

Transforms an rectangle specified in geodetic radians to the native coordinate system of this tiling scheme.
Parameters:
Name Type Attributes 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.
Source:
Returns:
The specified 'result', or a new object containing the native rectangle if 'result' is undefined.
Type
Rectangle

tileXYToNativeRectangle(x, y, level, resultopt) → {Rectangle}

Converts tile x, y coordinates and level to an rectangle expressed in the native coordinates of the tiling scheme.
Parameters:
Name Type Attributes 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.
Source:
Returns:
The specified 'result', or a new object containing the rectangle if 'result' is undefined.
Type
Rectangle

tileXYToRectangle(x, y, level, resultopt) → {Rectangle}

Converts tile x, y coordinates and level to a cartographic rectangle in radians.
Parameters:
Name Type Attributes 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.
Source:
Returns:
The specified 'result', or a new object containing the rectangle if 'result' is undefined.
Type
Rectangle