Want to import topology and attributes from CAD

JimDahl

I am trying to eliminate the use of AutoCAD Map for data updates.  I am able to import lines, text, polygons, and other features from within a CAD drawing, but I want the object data that is attached to the entities.  I also want to import the polygon topology that was created in CAD, instead of having to export from CAD as a shapefile.  Any suggestions are welcome.  Jim

JuanLuera

Hola Jim,

In order to import attributes you need to first setup a DWG seed file (http://help.arcgis.com/en/arcgisdesktop/10.0/help/index.html#//00100000001t000000.htm). This is setup in CAD by itself. There is no loading of anything.

Using the AutoCAD application, you define a block definition with attributes that correspond to the attribute fields in the ArcGIS point feature class. The insertion base point you define for the block defines the center of the ArcGIS point feature and its symbology.

So you will need to create a block entity in a AutoCAD DWG. In this Block entity it will have attributes that reference your Feature in ArcGIS's field names. Once this is saved you will use this dwg as the seed file for the feature to export correctly into a dwg.

As for walking though how to create a .dwg seed file here is the workflow from our help:
http://help.arcgis.com/en/arcgisdesktop/10.0/help/index.html#/Preparing_a_DWG_seed_file/001000000073000000/


1. Convert labels to annotation for all the fields you want in AutoCAD:
http://support.esri.com/en/knowledgebase/techarticles/detail/30328

-They have to be stored in a database (not the map) also you will have to export your shapefile to a file geodatabase to store them.
-They will come across as text in the annotation in CAD..

http://help.arcgis.com/en/arcgisdesktop/10.0/help/index.html#//00100000001q000000.htm

2. Export to a block entity in CAD:

Here is the information you need in order to convert data from an ESRI data format to AutoCAD, with block definitions, and the TAG names preserved in the output.

*You will have to create a AutoCAD seed file (template) that has BLOCK entities, with editable tag values, attributes defined as text

1] Add the following fields with the indicated definitions to the attribute table of the data to be converted.

CADType, Text field, length 32, populated with the word "Insert".
RefName, Text field, length 255, populated with the BLOCK name, as specified in the AutoCAD seed file.

2] Add additional fields to the geodatabase feature class attribute table, defined as Text fields, with appropriate lengths, with names that match the TAG names from the block in the seed file to be used when converting the data with Export to CAD.

*Note- Tags created in the AutoCAD seed file need to be identical to the field names of your feature class.

3] The new fields must then be populated with appropriate values, using the field calculator in ArcMap.

When you create data that will be converted to an output AutoCAD file, you create the field(s) in the attribute table originally with names that will match the names used for the TAGS in the AutoCAD seed file. This eliminates duplication of fields in the attribute table.

4] Running Export to CAD on the feature, each point feature became a block in the DWG, and the values for each tag are editable in AutoCAD with the ATTEDIT command.

http://help.arcgis.com/en/arcgisdesktop/10.0/help/index.html#//00100000001r000000.htm

Gracias, Jim!