new TileSystem(sx, sy, ox, oy) [source]
Similar with transformation, it contains 4 numbers: sx, sy, ox, oy.
var ts = new TileSystem([1, -1, -20037508.34, 20037508.34]);| Parameter | Type | Description |
|---|---|---|
sx
|
Number | the order of X-axis tile index, 1 means right is larger and -1 means the reverse, left is larger; |
sy
|
Number | the order of Y-axis tile index, 1 means top is larger and -1 means the reverse, bottom is larger; |
ox
|
Number | x of the origin point of the world's projected coordinate system |
oy
|
Number | y of the origin point of the world's projected coordinate system |
Members
(static, constant) "web-mercator"
The most common used tile system, used by google maps, bing maps and amap, soso maps in China.
(static, constant) "tms-global-mercator"
Predefined tile system for TMS tile system, A tile system published by OSGEO.
Also used by mapbox's mbtiles specification.
(static, constant) "tms-global-geodetic"
Another tile system published by OSGEO, based on EPSG:4326 SRS.
(static, constant) baidu
Tile system used by baidu
Static Methods
(static) getDefault(projection) [source]
Get the default tile system's code for the projection.
| Parameter | Type | Description |
|---|---|---|
projection
|
Object | a projection object |