Cross-Discipline Coordination: Civil 3D to Revit and Back Again
From his Autodesk University 2019 class, Kyle Groves, EIT, Senior Technical Specialist, explains about locating the Revit model in “real world” coordinates in the blog below.
Autodesk Revit allows design teams to collaborate in true BIM fashion, using linked models to make educated design decisions throughout the development of a project across the whole team, well, ah, the whole Revit team at least.
Since Civil disciplines are not using Revit, building teams tens to fall back to non-BIM strategies for coordination with Civil. However, just like Revit users, Civil 3D users have an increasingly high demand for streamlined information gathering and data quality- in a sense, they are living in the same ‘BIM’ world as the Revit team, but without a conduit to the data.
This class attempts to shorten the bridge between Civil 3D and Revit by discussing two common issues when collaborating between the two software: 1) surfaces vs. topographies, and 2) real-world positioning of projects.
High-Level Program Comparison
Autodesk Revit and Autodesk Civil 3D are…different. Remembering that each side is operating in a fundamentally different program is the starting point for any discussion about collaboration.
AutoCAD Civil 3D
- Civil Engineering design software
- Often used for infrastructure or city-wide projects
- AutoCAD at its core (+ 3D)
- Some parametric modeling….but mostly not
- Not innately collaborative (plug-ins available)
- Made for 3D surface creation and analysis
- Always real-world coordinates
- Building Information Modeling (BIM) Software
- Created for Building Design
- Completely different workflow from AutoCAD
- Parametric Modeling
- Created for Collaboration (at least in Revit)
- Does not read .dwg surfaces well
- Internal Project Coordinate Systems
What Civil 3D Wants from Revit
- Import Revit Building automatically at Architect’s intended location in real space
- Import clean architectural footprint for drawings
- Import accurate 3D building information for a better understanding of building design intent (entrances, ADA, canopies, etc.)
What Revit Wants from Civil 3D
- Civil files that generate visually accurate surfaces in Revit
- Dedicated layers for creation of topo and graphic control
- Labeled NEZ point in cad file for reference/check point
- Ideally, a way to link in Civil Surfaces into Revit like other consultant’s files….with topo that updates automatically
Watch the entire presentation:
Contact firstname.lastname@example.org to learn more and to reach out to Kyle Groves directly about training and services for your AEC firm.
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