GeographicProjection

new Cesium.GeographicProjection(ellipsoid)
Core/GeographicProjection.js 32

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:

Members

readonlyellipsoid : Ellipsoid
Core/GeographicProjection.js 47

Gets the Ellipsoid.

Methods

project(cartographic, result) → Cartesian3
Core/GeographicProjection.js 66

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.

unproject(cartesian, result) → Cartographic
Core/GeographicProjection.js 95

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.