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1File types that are unsupported can be opened in binary format.
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1st Method: Open it in another program.
When you double-click DEM files, your computer attempts to open it in a program associated with DEM files. If there’s no program associated with DEM files on your computer, the file won’t open. To open the file, download one of the most popular programs associated with DEM files such as Turing, Half-Life Demo File, or Descent Demonstration.
2nd Method: Take a hint from the file type.
The DEM file extension usually indicates it's under the umbrella of Game Files. However, if it’s another file type, it might not open with one of the programs listed above. Take the following steps to find the file type:
- Right-click the file.
- Click “Properties” (Windows) or “More Info” (Mac).
- Locate the file type under either “Type of File” (Windows) or “Kind” (Mac).
3rd Method: Check with the developer.
So you’ve tried using a different program, you’ve confirmed the file type, and your DEM file still won’t open. Even if these methods were unsuccessful, you might still be able to reach out to a software developer for help. Use the chart below to find the developer for each of the programs mentioned above and contact them directly for assistance.
| Software | Developed By |
|---|---|
| Turing | Holt Software Associates Inc. |
| Half-Life Demo File | Sierra |
| Descent Demonstration | Windows Software |
| Delphi Edit Mask | Borland Software Corporation |
| Creator Simulator Temporary File | Tufts University |
| ArcView Digital Elevation Model File | ESRI |
| USGS US Geological Survey National Mapping Division Topo30 3D File | USGS SDTS |
| Vista Digital Elevation Model File | Unknown |
| Quake/Hexen II .DEM File Format | Microsoft Programmer |
| Unreal Tournament Demonstration File | Epic Games Inc. |
| Demetra Automated Project ) | European Commission (Eurostat |
| Vista Pro Graphic | Windows Software |
| Raven Shield In-Game Recording | Ubi Soft Entertainment |
4th Method: Open it in a universal file viewer.
If the developer isn’t able to help, a universal file viewer probably can. File Magic (Download) and similar programs are designed to open a wide variety of file formats, including DEM files. Some aren’t compatible and will only open in binary. Download File Magic now to open you DEM and hundreds of other file types with one program!
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