About Exporting MicroStation DGN Files
You can export DWG files created by AutoCAD-based products to the MicroStationآ® DGN
drawing file format.
The export process translates basic DWG file data into the corresponding DGN file
data. There are several translation options to determine how certain data such as
external references are handled, the dynamic range of the DGN file as controlled by
the master and subunits specified, and whether the DGN file is to accept data with
non-zero Z coordinates.
Exchanging and reusing basic drawing data is very useful in collaborative projects.
For example, service organizations such as AEC and design-build firms using an AutoCAD-based
product might need to export a site plan to DGN format for access by a landscape firm
or perhaps a city planning department.
A Standard (default) mapping translation is used to map DWG-format layers, linetypes,
lineweights, and colors to DGN-format levels, linestyles, lineweights, and colors.
You can remap these elements based on your company CAD standards, therefore, streamlining
the export process while minimizing the need for editing the resulting DGN file (see
Understand the Limitations
The DGN import and export capabilities are designed to provide a fundamental exchange
of information between MicroStation DGN files and AutoCAD DWG files. However, translating
data from one format to a completely different format inevitably requires compromises
- Simple geometric objects such as lines, arcs, and circles, and properties such as
layer assignments correlate directly between the DWG and DGN data formats.
- Data with built-in features or variations are visually approximated. For example,
text and dimensions might have specialized formatting, and color definitions might
- Some data cannot be translated completely. For example, product-specific features
such as dynamic blocks, can be represented visually but not behaviorally.
- Nested references are not merged into the host DGN file when exporting a DWG file
with nested references as V7 DGN. The nested reference is not displayed in the host
DGN file but the reference chain still exists.
- AEC objects are not supported and users must use EXPORTTOAUTOCAD command to convert
the objects to base ACAD objects before exporting to DGN.
- AutoCAD does not support exporting linetype definitions with DGN files. If a DGN file
contains linetype definitions, but .rsc files do not contain these linetype definitions
in the Symbology path in MicroStation, then when the DGN file is exported from AutoCAD
and opened in MicroStation, the linetypes do not display correctly because of missing
See the DGNEXPORT Conversion Table specific details about the scope of exporting DWG
objects and other data to DGN files.
V8 DGN references cannot display in a V7 DGN file because the V8 DGN file format is
not a valid design file for the resulting V7 DGN file.
To optimize the data transfer to the MicroStation DGN file format, consider the following
- Minimize the use of custom objects and other data unique to AutoCAD-based products
- Use simple linetypes as much as possible
- Use simple hatches and hatch styles
- Use simple gradients and gradient styles
- Use simple dimension styles if possible
- Use TrueType text fonts rather than SHX text fonts
- Work primarily in one format, DWG or DGN, rather than switching back and forth
When exporting DWG data to DGN files, you need to specify the conversion units of
the DGN seed file (master units or sub-units) correctly based on the drawing units of the DWG file.
For example, if the DWG file you are exporting to DGN is drawn in inches, and the
DGN seed file you are exporting to has master units set to feet and sub-units set
to inches, you need to select sub-units in the Export DGN dialog box. If you select
master units instead of sub-units, the scale of the imported DWG file will be incorrect.
For example, a 36-inch door would display as a 36-foot door.
Windows operating system considers valid for file names. Thus, it is recommended that
you do not use accented or Asian characters in file names when using DGNEXPORT.
sp optimize the data transfer to the MicroStation DGN file format, consider the following recommendations: Minimize the use of custom objects and other data unique to AutoCAD-based products. Use simple linetypes as much as possible. Use simple hatches and hatch styles. Use simple gradients and gradient styles.export DWG files created by AutoCAD-based products to the MicroStation® DGN drawing file format. The export process translates basic DWG file data …… Another option we could do is create a new blank DGN file and from there as it is shown on the attached screenshot we can import the model …… In order to convert a DWG file to DGN format. Steps: 1) Open the DWG file in MicroStation using File>Open 2) From Menu bar, Choose File> …… This tutorial will show you how to convert an AutoCAD DWG (*.dwg) file to MicroStation DGN (*.dgn) format. The AutoCAD roads data is divided …exporting to an AutoCAD® DWG or a MicroStation® DGN fileThe Civil 3D 2104 Productivity Pack 1 is for Autodesk subscription customers only.MicroStation DGN files can be saved with nonstandard file extensions to denote content; for example, you can save a DGN file with a .par extension to identify …export feature classes and shapefiles to V8 DGN and DWG/DXF CAD … MicroStation seed files contain critical information about the drawing's global …3 Apr 2013