2011

Table Of Contents
If you use the Bursa/Wolfe or Seven Parameter Transformation conversion
method, fill in all four edit boxes under Rotation Angle From WGS-84 In
Arc Seconds.
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 an Ellipsoid
You can define a new
ellipsoid (page 2062) based on your own data or use a
predefined ellipsoid as a basis for creating your own.
When defining a custom ellipsoid, you must specify the calculation method
and values used to determine the dimensions of the ellipsoid. After choosing
the calculation method, you supply two of the required values, and AutoCAD
Map 3D determines the remaining two values for you.
See also:
Overview of Coordinate Systems (page 143)
Overview of Grid Data Files and Datum Shift Issues (page 103)
Defining a New Datum (page 93)
To define an ellipsoid
1 Do one of the following:
On the General tab of the Define Datum dialog box or the Modify
Datum dialog box, under Ellipsoid, click Define.
Click Map Setup tab Coordinate System panel Define Global
Coordinate System.
Select Define or Modify.
Creating New Coordinate Systems | 95