.DLG File Extension
Digital Line Graph
| Developer | USGS |
| Popularity |
3.0 | 8 Votes |
What is a DLG file?
A DLG file is a geographic data file used by various Geographic Information Systems (GIS) applications, such as Safe Software FME Desktop ESRI ArcGIS for Desktop. It stores vector-based data in the Digital Line Graph (DLG) format that represents natural and manufactured features such as roads, rivers, and elevation contours. Government agencies, researchers, and GIS professionals commonly use DLG files for land planning, environmental studies, and infrastructure projects.
More Information
United States Geological Survey (USGS) developed the DLG format. Depending on the standard used, DLG (Digital Line Graph) files may store data in binary and text formats:
- DLG-3 files (older standard) are typically stored in ASCII text format, making them human-readable and easier to edit manually.
- DLG-F files (modern standard) use a binary format, which is more compact and efficient for processing but not easily readable without specialized GIS software.
How to open a DLG file
You can open DLG files with various Safe Software FME Desktop, ESRI ArcGIS for Desktop, and TatukGIS Viewer in Windows. For example, you can open a DLG file with FME Desktop in a workspace by clicking Add Reader (or go to Readers → Add Reader) and then selecting "USGS Digital Line Graph (DLG)" in the Format field.
Programs that open DLG files
Dialogue File
| Developer | N/A |
| Popularity |
3.0 | 7 Votes |
Dialogue file used by games such as Crysis, a first person shooter game developed by Crytek; contains a character dialogue that is referenced during gameplay; can be edited by the user with a text editor.