一个简单的地图投影，其中经度和纬度通过乘以 X 和 Y 线性映射到 X 和 Y A simple map projection where longitude and latitude are linearly mapped to X and Y by multiplying them by the
Ellipsoid#maximumRadius。这种投影通常被称为地理投影、等距圆柱投影、等距圆柱投影或板方舟投影。当使用 WGS84 椭球体时，也称为 EPSG:4326。 . 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.
| 名称 Name | 类型 Type | 默认值 Default | 说明 Description |
|---|---|---|---|
ellipsoid |
Ellipsoid |
Ellipsoid.default
|
可选 optional 椭球体。 The ellipsoid. |
另见： See:
成员 Members
readonly ellipsoid : Ellipsoid
得到 Gets the
Ellipsoid.
方法 Methods
project(cartographic, result) → Cartesian3
项目一组 Projects a set of
Cartographic 坐标（以弧度为单位）映射到地图坐标（以米为单位）。 X 和 Y 分别是经度和纬度乘以椭球体的最大半径。 Z 是未修改的高度。 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.
| 名称 Name | 类型 Type | 说明 Description |
|---|---|---|
cartographic |
Cartographic | 要投影的坐标。 The coordinates to project. |
result |
Cartesian3 | 可选 optional 将结果复制到的实例。如果该参数未定义，则创建并返回一个新实例。 An instance into which to copy the result. If this parameter is undefined, a new instance is created and returned. |
返回： Returns:
投影坐标。如果结果参数不是未定义的，则将坐标复制到那里并返回该实例。否则，将创建并返回一个新实例。 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
取消投影一组投影 Unprojects a set of projected
Cartesian3 坐标，以米为单位，到 coordinates, in meters, to Cartographic
坐标，以弧度为单位。经度和纬度分别是 X 和 Y 坐标除以椭球体的最大半径。高度是未修改的 Z 坐标。 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.
| 名称 Name | 类型 Type | 说明 Description |
|---|---|---|
cartesian |
Cartesian3 | 取消投影高度 (z)（以米为单位）的笛卡尔位置。 The Cartesian position to unproject with height (z) in meters. |
result |
Cartographic | 可选 optional 将结果复制到的实例。如果该参数未定义，则创建并返回一个新实例。 An instance into which to copy the result. If this parameter is undefined, a new instance is created and returned. |
返回： Returns:
未投影的坐标。如果结果参数不是未定义的，则将坐标复制到那里并返回该实例。否则，将创建并返回一个新实例。 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.