DGN

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This article is about the computer file format. For the Illinois high school, see Downers Grove North.

DGN (Design) is the name used for CAD file formats supported by Bentley Systems' MicroStation and Intergraph's Interactive Graphics Design System (IGDS) CAD programs.

There are two versions of DGN:

  • Up until 2000, all DGN files were based on the Intergraph Standard File Format (ISFF) specification, published in the late 1980s by Intergraph. Sometimes referred to as V7 DGN, or Intergraph DGN.
  • In 2000, Bentley Systems created an updated version of DGN which includes a superset of DGN's capabilities, but which has a different internal data structure than the ISFF-based DGN. This version is properly referred to as V8 DGN.

Although DGN is not as widely-used as Autodesk's DWG, it is nevertheless mission critical in many large projects, including buildings, highways, bridges, process plants, shipbuilding.


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