Technical data

Managing Points
133
Key Concepts
■
Data substitution in point groups with XDRefs is limited to point
name, point label style, description, and elevation. However, you
can add any data you want to point labels.
■
XDRefs never actually change the point database information. They
only substitute information for what exists in the database or
append data to the labels. However, if you use elevations from an
external file, then those elevations are used when creating a
surface, not the elevations within the point database.
■
XDRefs can be made only to Microsoft

Access databases.
■
The XDRef database, XDRefs.mdb, which contains the links to the
columns in external databases, is stored in the
c:\Land Projects R2\<project name>\cogo folder and is used for all
XDRefs in the project.
To use XDRefs to label points
Steps
Use
to look up
1
Populate the sample user database in the
current project with some information that you
can experiment with. To do this, use Microsoft
®
Access to open the SampleUserDB.mdb in the
c:\Land Projects R2\<project name>\cogo\User
Db folder. This sample file is copied into every
new project that you create.
Create an External Point
Database with Microsoft
®
Access
2
Add some sample data to SampleTable1, such as
elevations and descriptions.
3
Save the file and exit Microsoft

Access.
4
Create a new project and a new drawing in
AutoCAD Land Development Desktop.
5
From the Points menu, choose Point
Management
➤
XDRef Manager to display the
XDRef Manager dialog box.