GeographicProjection - Cesium Documentation

# GeographicProjection

#### new GeographicProjection(ellipsoid)

  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. It is also known as EPSG:4326.

  Name | Type | Default | Description
  --- | --- | --- | ---
  `ellipsoid` | Ellipsoid | `Ellipsoid.WGS84` | optional The ellipsoid.

  ##### See:

  - WebMercatorProjection
  Source: Core/GeographicProjection.js, line 33

### Members

#### readonlyellipsoid :Ellipsoid

  Gets the `Ellipsoid`.
  Source: Core/GeographicProjection.js, line 48

### Methods

#### 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.

  Name | Type | Description
  --- | --- | ---
  `cartographic` | Cartographic | The coordinates to project.
  `result` | Cartesian3 | optional An instance into which to copy the result. If this parameter is undefined, a new instance is created and returned.

  ##### Returns:

  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.
  Source: Core/GeographicProjection.js, line 67

#### 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.

  Name | Type | Description
  --- | --- | ---
  `cartesian` | Cartesian3 | The Cartesian position to unproject with height (z) in meters.
  `result` | Cartographic | optional An instance into which to copy the result. If this parameter is undefined, a new instance is created and returned.

  ##### Returns:

  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.
  Source: Core/GeographicProjection.js, line 96