Geodetic to cartesian conversion

Added in version 5.0.0.

Convert geodetic coordinates to cartesian coordinates (in the forward path).

Alias

cart

Domain

3D

Input type

Geodetic coordinates

Output type

Geocentric cartesian coordinates

This conversion converts geodetic coordinate values (longitude, latitude, elevation above ellipsoid) to their geocentric (X, Y, Z) representation, where the first axis (X) points from the Earth centre to the point of longitude=0, latitude=0, the second axis (Y) points from the Earth centre to the point of longitude=90, latitude=0 and the third axis (Z) points to the North pole.

Usage

Convert geodetic coordinates to cartesian (uses default +ellps=GRS80):

echo 17.7562015132 45.3935192042 133.12 2017.8 | cct +proj=cart
4272922.1553   1368283.0597  4518261.3501     2017.8000

Parameters

+ellps=<value>

The name of a built-in ellipsoid definition.

See Ellipsoids for more information, or execute proj -le for a list of built-in ellipsoid names.

Defaults to "GRS80".