2011

Table Of Contents

Attributes

If you connect to the data, rather than import it, and extract the geometry

from the feature data, the attributes are lost.

Bringing the Data Back Into AutoCAD Map 3D

After changes have been made to the data, you can bring it back into AutoCAD

Map 3D in one of the following ways:

■ Import the data in DWG format. If anyone changes the data after that,

those changes will not appear in your map unless you reimport. Import

gives you a "snapshot" of the data at the moment that you import. This

method is best for changes to many objects in one area of the map. It works

best if you classify the objects before you export them, and then map to

those object classes when you reimport.

■ Connect to the data (using Data Connect) and then extract the geometry

from the changed features. You can then update your original DWG files

with the new information. The data remains in its original format, and

any further changes in its data store appear in your map. This method is

best for small changes.

If you plan to reimport SDF data using either method, you will get the best

results if you export only the properties you want edit to a multi-class SDF

file. You can then map the properties to separate layers when you import the

SDF file.

Preserving Visual Styles

When you export styled drawing data, the visual styling is lost. You can use

two alternative methods to preserve styling information:

■ Set up a drawing template file (.dwt) that includes styling information for

the drawing objects you wish to include (layers, linetypes, blocks, and so

on). For more information on using drawing templates, see the AutoCAD

2009 User’s Guide.

■ Publish your map to the DWF format., which preserves all styling. Use

Autodesk Design Review to examine and mark up the resulting map. You

can then update the original DWG data from those markups.