Graphics Programs Reference
In-Depth Information
• Link data consistently and in the correct location
• Prepare data prior to import
2D Data Types
Revit works reasonably well with file types other than native RVT project
files. Many of the issues you will encounter are due to the differences
betweenexistingCADtechnologies,whichforthemostpartrelyon
elements
(lines, arcs, and circles), while the newer BIM technologies are founded on
object-based
parametric databases.
The AutoCAD file format has differences even among drawings that are
created in the same AutoCAD version. For example, virgin AutoCAD can
sometimes produce an error when opening a DWG file that was created
in any of the
vertical products
(AutoCAD
®
Civil 3D
®
, AutoCAD
®
Architecture, AutoCAD
®
MEP, and so on). When you import this file into
Revit, the error shown in
Figure 5.1
is displayed.
Figure 5.1
Elements Lost On Import warning
An additional message is the one displayed in
Figure 5.2
. Although not
exactly an error message, it should make the user take notice—were you
actually expecting objects to be in AutoCAD model space? If so, then there
may be some fidelity issues with the drawing file that you are trying to link.
