2011

Table Of Contents
MicroStation Design (DGN) Versions 7 and 8
You can import and export Microstation DGN version 7 and 8. Bentley Systems,
Inc., and MicroStation programs use the DGN format. Like DWG, a single
DGN file can contain points, lines, areas, text, and other object types.
Importing
Microstation DGN files can only be imported (and exported). They cannot be
accessed using Data Connect. Data-element information is stored in an external
database file and linked to graphic objects. AutoCAD Map 3D imports database
link information so you can
maintain the linkage during import (page 433).
By default, object colors are imported to their closest ACI (AutoCAD Color
Index) color. To import object colors using RGB (True Color), edit the
mapimport.ini file.
For DGN8, the Input Layer column lists the model name. To see the layers
for a specific model, you may need to scroll the list.
Driver Options for DGN 7
You can set the following options when importing DGN 7 files:
DescriptionOption
Choose Geometry to group incoming objects by entity type.
Choose Level to group them by their DGN level or level name.
Only levels that contain elements will be imported.
Group Elements By
Allows you to extract MSLinks and FRAMME attribute linkage
values from the DGN 7 file. If you select MSLinks, AutoCAD
Linkage Extraction
Map 3D imports up to three links per object for DGN 7. For
each link, two fields are added to the object data table:
mslinks_n, which specifies the key value, and entity_num_n,
which specifies the table. If you select FRAMME, the following
fields are added to the object data table: comp_count,
comp_num, dgnfile, feat_num, state_num, and ufid.
Each DGN 7 file defines a UOR (unit of resolution); in addition,
it can define Sub units and Master units. Select Master or Sub
Coordinate Units
to specify which of these units in the DGN 7 file matches the
default unit in the AutoCAD Map 3D map. For example, if
the default unit in your AutoCAD Map 3D map is meters, and
meters are the Sub unit in the imported file, select Sub. If you
Supported Import Formats | 405