Autodesk AutoCAD RealDWG DWG/DXF Writer Parameters

Attribute Output

This parameter specifies the default manner in which attribute data will be stored. Note that storing attributes may greatly increase the size of the output AutoCAD file.

Extended Entity Data

Attribute: extended_entity_data

If selected, attempts to store schema attributes on a layer as extended entity data. For more information, see Extended Entity Data.

Inserts

Specifies whether the writer should attempt to store schema attributes on a layer as insert attributes for block insert features, or new block features.

If selected, when it creates the inserts, the writer attempts to add the schema attributes defined by the layer definition. In this case, any format specific insert attributes in the fme_attrib_info list attributes are ignored.

If not selected, the writer attempts to write fme_attrib_info list attributes (added by the AutoCAD reader) as insert attributes. Note that this is only done if the autocad_attributes_follow attribute is set. The AutoCAD reader automatically sets this attribute.

Limited (default)

Attribute: external_attributes

Instructs the writer to not store any attribution in the AutoCAD file, with the exception of extended entity data list formatted.

Insert attributes may also be created for insert entities, from fme_attrib_info list, if the autocad_attributes_follow attribute is set.

File Options

AutoCAD Version

Specify the AutoCAD release that will be compatible with the output file.

Template File

Template File

A template file is an AutoCAD file that defines layers, line styles, blocks and shape definitions which are referenced during translation. This option allows you to define the template file by entering a template filename or browsing to a file location.

Note   Template files are also known as prototype files.

Preserve Model Space Data

This parameter can be used to allow the file specified in the Destination Autodesk AutoCAD File parameter to be written as the concatenation of the Model Space contents of the file specified by the Template File parameter with all written data.

By default, it is set to No, so only header information but no Model Space entities are used from the template file if one is specified. If this parameter is set to Yes, then the full header and Model Space entities are used from the template file.

Preserve Paper Space Data

This parameter can be used to allow the file specified in the Destination Autodesk AutoCAD File parameter to be written as the concatenation of the Paper Space contents of the file specified by the Template File parameter with all written data.

By default, it is set to Yes, so the Paper Space entities are used from the template file if one is specified. If this parameter is set to No, then the Paper Space entities are not used from the template file.

Default Application Name

The application name that is used when writing extended entity data.

Output Defined Attributes Only

When this parameter is set to Yes (default), only those attributes defined as part of the layer definition will be stored. See the Writer Feature Type Parameters for more details.

If this parameter is set to No, most feature attributes (except those that start with autocad) are stored.

AutoCAD Shape File Folder

Specifies the folder in which to look for shape files (*.shp) from which information about SHAPE entities will be extracted for writing. For more information, see Shapes.

Created Block Name Prefix

The names of blocks created by the writer during automatic block creation.

This parameter may be used to specify a prefix for block names that are created by the writer during automatic block generation. Automatic block generation occurs for features written with aggregate and other geometries which are best represented by block entities.

This parameter is only used when Use the Block Name to Create Blocks parameter is set to No, and is not used for features that already have an autocad_block_name attribute specified.

The names of created blocks will take the form:

<Block Name Prefix>_<blocknumber>

Coordinate System Storage

This parameter controls whether the writer will optionally store the coordinate system of its features. The coordinate system can be stored inside the output AutoCAD file as an Esri Well Known Text (in an ESRI_PRJ entry in an internal dictionary in the file), according to Esri specifications. It can also be stored externally in a companion Esri .prj file that shares the output AutoCAD file's base name, but has a .prj extension. Lastly, it can be stored internally using the native Coordinate System storage which will be recognized by the native AutoCAD application.

Values:

  • None (projection information is not stored anywhere)
  • External PRJ
  • Internal Native
  • Internal WKT

AutoCAD data files written this way with projection information will be recognized by FME and the free ArcGIS for AutoCAD application, which installs on top of the AutoCAD application.

Purge Unused Objects

This parameter can be used to toggle purging of unused objects or entities before the final drawing file is written out.

Unused objects are those which are not referenced by other objects in the drawing. For example, for a layer to be eligible to be purged, there must be no entities on that layer.

If set to Yes, the AutoCAD writer will attempt to purge the following object types:

  • Blocks
  • Layers
  • Detail View Styles
  • Dimension Styles
  • Groups
  • Linetypes
  • Materials
  • MLine Styles
  • MLeader Styles
  • Registered Applications
  • Section View Styles
  • Table Styles
  • Text Styles
  • Visual Styles

Prefer writing donuts as hatches

This parameter can be used to change how donut geometries on features with autocad_entity attributes not set to autocad_hatch or autocad_mpolygon, are represented as AutoCAD entities.

If this parameter is set to Yes, and a donut is planar, then it will be written as a hatch entity. Donuts with three dimensions will only be written as hatches if they have a constant Z value, which can be stored as the hatch elevation.

If a donut is not oriented in the XY plane, then the feature must have autocad_extrusion_x, autocad_extrusion_y, and autocad_extrusion_z attributes set which indicate the normal vector direction, orthogonal to the plane of the object. If not, the hatch may have Z values dropped, to force it into the XY plane.

If this parameter is set to No, or a donut is not planar, then that donut will be handled like a multi-area geometry, and will be written as a block.

Insertion Scale Units

This parameter can be used to set the INSUNITS variable of the destination dataset to one of the following units:

  • Inches
  • Feet
  • Miles
  • Millimeters
  • Centimeters
  • Meters
  • Kilometers
  • Microinches
  • Mils
  • Yards
  • Angstroms
  • Nanometers
  • Microns
  • Decimeters
  • Dekameters
  • Hectometers
  • Gigameters
  • Astronomical
  • Lightyears
  • Parsecs

When this parameter is not set, the INSUNITS variable is taken from a template file, if specified. The INSUNITS variable specifies the drawing units used in the scaling of inserted entities such as blocks.

This parameter behaves like a declaration of the type of units, but it does not change the scale or coordinates of existing entities, nor does it affect any entities to be written by the AutoCAD writer.

Index Type

Controls whether layer and spatial indexes are created and saved in drawing files.

  • None – No indexes are created.
  • Layer – Layer index is created.
  • Spatial – Spatial index is created.
  • Layer & Spatial – Layer and spatial indexes are created.

Please see the Autodesk Knowledge Network for detailed information about Layer and Spatial Indexes.