2011

Define, delete, or modify using this
method...
For this item...
To define a coordinate system (page 92)
To modify or delete a coordinate system
(page 98)
global coordinate system (page 2065)
To define a datum (page 94)
To modify or delete a datum (page 99)
Datum
To define an ellipsoid (page 95)
To modify or delete an ellipsoid (page 100)
Ellipsoid
To create a coordinate system category
(page 97)
To edit or delete a coordinate system cat-
egory (page 101)
Coordinate system category
Quick Reference
ADEDEFCRDSYS
Defines a global coordinate system
Setup menu ➤ Define Global Coordinate System
Menu
ADEDEFCRDSYSCommand Line
Global Coordinate System Manager Dialog BoxDialog Box
Defining a Global Coordinate System
You can define a new
global coordinate system (page 2065) based on your own
data or use a predefined coordinate system as a basis for creating your own.
Depending on the projection you use to define a custom coordinate system,
you must provide certain information. For example, if you use the Transverse
Mercator projection, you must specify a longitude value called the central
meridian.
Creating New Coordinate Systems | 91