A simple map projection where longitude and latitude are linearly mapped to X and Y by multiplying
them by the
Ellipsoid#maximumRadius. This projection
is commonly known as geographic, equirectangular, equidistant cylindrical, or plate carrée. When using the WGS84 ellipsoid, it
is also known as EPSG:4326.
| 参数名称 | 类型 | 默认值 | 描述信息 |
|---|---|---|---|
ellipsoid |
Ellipsoid |
Ellipsoid.default
|
可选 The ellipsoid. |
成员(属性)
readonly ellipsoid : Ellipsoid
Gets the
Ellipsoid.
方法
project(cartographic, result) → Cartesian3
Projects a set of
Cartographic coordinates, in radians, to map coordinates, in meters.
X and Y are the longitude and latitude, respectively, multiplied by the maximum radius of the
ellipsoid. Z is the unmodified height.
| 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 a set of projected
Cartesian3 coordinates, in meters, to Cartographic
coordinates, in radians. Longitude and Latitude are the X and Y coordinates, respectively,
divided by the maximum radius of the ellipsoid. Height is the unmodified Z coordinate.
| 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.