Exporting To Shape Multiclass
Concept Procedure

Drawing (DWG) objects can contain multiple geometry types, while SHP files contain only one. However, the Shape Multiclass option lets you export multiple drawing objects to a set of SHP files in a folder you specify. Each resulting SHP will contain the geometry and attributes for a single geometry type. For example, if pipes, roads, and streams are all represented by lines, you will export three sets of SHP files, each one containing the geometry and attributes for one of those object types. For information about the set of files produced for SHP and their naming conventions, see Importing ESRI Shape Files.

NoteThere is also an MapExport.ini folder export option.


You can specify that the resulting files use a single feature class or multiple feature classes based on layer, object classification, object data, or link templates.

All new SHP classes that contain text entities will have a property called TEXTSTRING. To bring this information back into AutoCAD Map 3D, select the import option to import points as text.

To create polygons when you use this export option, select the Treat Closed Polylines As Polygons option.

You can export to a single feature class that uses all the items you specified on the Data tab. To do this, click One class and type a name for that class.

You can export data to multiple classes at one time and combine the data organization in your drawing with your selections on the Data tab to determine the attributes for each exported feature class.

Export Restrictions

SHP files do not support color; in ArcView, each theme is assigned a color that is used when an item is drawn.

SHP files do not support circular arcs. During export, arcs, splines, and ellipses are converted to segmented polylines. You can change the settings used for segmentation in the mapexport.ini file.

You cannot map fields when you export to Shape Multiclass. If you need to map fields, export your DWG data to SDF first, and then use Migrating Data Bulk Copy to export the data to SHP.

Overwriting and Appending

If you export to an existing folder containing files with the same names as those that will be generated by the export, you can choose to overwrite the existing data or append the new data to it. Overwriting can destroy the existing files when it creates new ones. Appending adds the data in the current export operation to the existing data without deleting any existing data. If you append and you are transforming the coordinate system for the data, the old data and the new data must both use the same source and target coordinate systems. You cannot use the append option to update existing data, but only to add new data.

NoteIf your data meets these criteria but the export operation fails, try deleting the relevant .prj files in the target folder and then retry the export operation.

Driver Options

When exporting to SHP files, you can select 2 Dimension Shape Files or 3 Dimension Shape Files from the driver options.

See Also