Coordinate system: definition (structure)
Definition
A coordinate system is defined by:
 a name (and a comment)
 a type of coordinate system
 a reference coordinate system (or parent coordinate system)
 the positioning of the coordinate system in the reference coordinate system
Name
The name to identify the coordinate system is set by the user during the creation of this one.
A comment (optional) can be added to the name.
Types of coordinate systems: 2D domain
The different types of coordinate systems and the characteristics useful for their description are gathered in the table below:
Type of coordinate system  Required fields 

Cartesian  (x,y) 
Cylindrical  (r,θ) 
Propagated from another coordinate system 
Transformation which defines the propagation Origin coordinate system 
Types of coordinate systems: 3D domain
The different types of coordinate systems and the characteristics useful for their description are gathered in the table below:
Type of coordinate system  Required fields 

Cartesian  (x,y,z) 
Cylindrical  (r,θ,z) 
Spherical  (r,θ,φ) 
Propagated from another coordinate system 
Transformation which defines the propagation Origin coordinate system 
Reference coordinate system
A coordinate system is defined with respect to a reference coordinate system (or parent coordinate system). The different reference coordinate systems are presented in the table below:
Coordinate system  Description  

defined with respect to the global coordinate system  length unit (m, mm, µm, inch, user's unit) 
angle unit (degree or radian) 
defined with respect to a local coordinate system  name of parent coordinate system 
Positioning: 2D domain
A coordinate system is positioned in its reference coordinate system using:
 the center coordinates of this coordinate system expressed in the reference coordinate system
 rotation angles of the axes of this coordinate system with respect to the axes of the reference coordinate system
Origin of coordinate system  Rotation angle 



Positioning: 3D domain
A coordinate system is positioned in its reference coordinate system using:
 the center coordinates of this coordinate system expressed in the reference coordinate system
 rotation angles of the axes of this coordinate system with respect to the axes of the reference coordinate system
Origin of coordinate system  Rotation angle 


