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What's New in Civil 3D
- What's New in Civil 3D 2026
Release Notes
Help
- Getting Started
- Projects
- Survey
- Points
- Lines and Curves
- Surfaces
- Sites
- Grading
- Catchments
- Parcels
- Alignments
- Superelevation
- Rail
- Profiles
- Sections
- Moving Land Desktop Data into Civil 3D
- Material and Quantity Analysis
- Pipe Networks and Part Builder
- Pressure Networks
- Corridor Modeling
- Labels and Tags
- Tables
- Reports
- Rendering
- Transparent Commands
- Utilities
- File and Data Sharing
  - Data Sharing
  - Exchanging Data with Autodesk InfraWorks
  - Working With Esri ArcGIS Data
  - Exporting to Civil View for 3ds Max
  - LandXML Import and Export
  - Importing Architectural Data
  - Moving Land Desktop Data into Civil 3D
  - HEC-RAS Import and Export
  - DGN Data
  - Exporting to KML
  - Importing and Exporting Industry Foundation Class (IFC) Files
  - Working With the Shared Reference Point Tool
- Plan Production Tools
- Dialog Box Reference
- Glossary
Tech Preview: Drainage Analysis
Tutorials
Best Practices Guide
Have You Tried
Subassembly Reference
Subassembly Composer Help
Project Explorer Help
IFC 4.3 Extension for Autodesk Civil 3D
Dynamo for Civil 3D
Survey and Transform Tools for Coordinate Geometry (in English only)
Infrastructure Content Authoring
Content Browser Help
Object Enabler Help
CAiCE Translator Help
API Reference Guide
Developer's Guide
Learn AutoCAD Map 3D
Use AutoCAD Map 3D
Customize AutoCAD Map 3D
AutoCAD User's Guide
Customization and Administration Guides
AutoLISP: Developer's Guide
AutoLISP: Reference
Autodesk Civil 3D Installation

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DGN Data

Topics in this section

About Attaching a DGN File as an Underlay
You can import MicroStation® DGN drawing files into DWG files and then copy nested objects for use in the host drawing.
To Attach a DGN File as an Underlay
To Copy Objects That Are Nested in a DGN Underlay

Parent topic: File and Data Sharing

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