MEDIUM ![]() | ![]() | |
| Name | Initial Graphics Exchange Specification | AutoCAD Drawing |
| File extension | .igs, .iges | .dwg |
| Original software | AutoCAD | |
| Binary | ||
| ASCII | ■ | |
| Polygonal | ■ | |
| NURBS | ■ | ■ |
| Solids | ■ | |
| Smoothing groups | ■ | ■ |
| Textures, materials | ■ | |
| Developer/Owner | U.S. National Bureau of Standards | Autodesk |
| Description | ||
| Specification | Download PDF | |
| Format features | Universal open interchange NURBS-surfaces format. Along with STEP - one of the most popular | Despite the « two-dimensional » AutoCAD specialization, it is possible to create solid models. Autodesk itself for three-dimensional modeling software promotes Inventor |
| Viewing software | Delcam Exchange 2012 (free), eDrawings (free) | DWG TrueView (free), DWGSee (free) |