Defines how geodetic ellipsoid coordinates (
Cartographic) project to a
flat map like Cesium's 2D and Columbus View modes.
成员(属性)
readonly ellipsoid : Ellipsoid
Gets the
Ellipsoid.
方法
project(cartographic, result) → Cartesian3
Projects
Cartographic coordinates, in radians, to projection-specific map coordinates, in meters.
| 参数名称 | 类型 | 描述信息 |
|---|---|---|
cartographic |
Cartographic | The coordinates to project. |
result |
Cartesian3 | 可选 An instance into which to copy the result. If this parameter is undefined, a new instance is created and returned. |
返回值:
The projected coordinates. If the result parameter is not undefined, the
coordinates are copied there and that instance is returned. Otherwise, a new instance is
created and returned.
unproject(cartesian, result) → Cartographic
Unprojects projection-specific map
Cartesian3 coordinates, in meters, to Cartographic
coordinates, in radians.
| 参数名称 | 类型 | 描述信息 |
|---|---|---|
cartesian |
Cartesian3 | The Cartesian position to unproject with height (z) in meters. |
result |
Cartographic | 可选 An instance into which to copy the result. If this parameter is undefined, a new instance is created and returned. |
返回值:
The unprojected coordinates. If the result parameter is not undefined, the
coordinates are copied there and that instance is returned. Otherwise, a new instance is
created and returned.