You can move AutoCAD
drawing data from AutoCAD Map 3D to SDF or Oracle and back into AutoCAD Map 3D.
For example, you can export drawing objects to an SDF file to give
to someone who must change those objects. Once the changes are made,
you can incorporate them into your original drawing file.
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
- 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.