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CAD tip CAD tip # 7396:

   
Question CAD 
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Q - question

How to convert block attributes to object data?

A - answer AutoCAD Map 3D and AutoCAD Civil 3D support effective storage of non-graphical entity data as "object data" (OD). How can you convert existing block attribute information to this object data?

1. First method:
In the object data definition (ADEDEFDATA, Map > Define object data) choose "Create new table" to create a blank table containing identical items as the existing block attributes (tags). No default values are neccessary. Then start the ADEGENLINK command (Generate links, Map > Database) and set its dialog similarly to the picture. Select the appropriate linkage type (Blocks), under "Data Links" select "Create Object Data Records", choose your defined table, choose block, select OK. The links are generated automatically and the attribute values are copied into object data (OD).

Map OD - ADEGENLINK

2. Second method:
If you want to "cheat" and you don't want to define tables, just export (MAPEXPORT) the blocks to an ESRI shapefile (SHP) while using the OD option, erase the blocks and then re-import the shapefile into AutoCAD Map (MAPIMPORT) - when the import dialogue shows up, choose to import data in the OD tables under the Data column (see the "..." button) and set point mapping to blocks (the last column). This will automatically create tables and the desired fields, you just have to play around with modify the tables.

Map OD - export SHP

Map OD - import

MapCivil
100% *  CAD 
7.6.2010    27250×  
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applies to: AutoCAD Map 3D · Civil 3D ·

See also:
Tip 14039:How to display the total volume or surface of 3D solids in DWG?
Tip 13938:ModDXF - utility for bulk modification/display of internal DXF properties in DWG entities.
Tip 13683:Limitations of the LISP language (AutoLISP, VisualLISP) in AutoCAD LT - what to watch out for
Tip 13604:Importing points from a Shape file as symbols/blocks mapped to object data.
Tip 13522:LookupXLS - populating DWG texts from Excel spreadsheets.


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