2011

If you are creating a new coordinate system based on an existing
coordinate system, you must change the code before you can change any
of the other information.
5 Enter a description.
AutoCAD Map 3D displays the description in the Coordinate Systems In
Category list of the Global Coordinate System Manager dialog box.
6 In the Units box, select the units to use for this coordinate system.
7 Under Coordinate System Type, select one of the following:
■ To base the coordinate system on a
datum (page 2059), select Geodetic.
Click Select to specify the datum.
■ To base the coordinate system on an
ellipsoid (page 2062), select
Non-Geodetic. Click Select to specify the ellipsoid.
8 On the Projection tab, select a projection.
The projection you choose determines how many projection parameters
you must enter and the units you can use.
9 Optionally, under False Origin, enter Northing and Easting values.
10 Under Projection Parameters, enter values for the remaining fields in the
dialog box. Click OK.
These fields vary according to the projection you select.
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 New Datum
You can define a new datum based on your own data or use a predefined
datum (page 2059) as a basis for creating your own.
Creating New Coordinate Systems | 93