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:
|
Members
ellipsoid : Ellipsoid
Gets the ellipsoid that is tiled by this tiling scheme.
projection : MapProjection
Gets the map projection used by this tiling scheme.
rectangle : Rectangle
Gets the rectangle, in radians, covered by this tiling scheme.
Methods
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.
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
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
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
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
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.