The USGS developed and released a viewer for these files, but it runs only on Microsoft Windows. It reads DLG files to produce maps such as those shown at the left. Click on any image to see a full-size screen snapshot. Multiple maps are properly joined.
Interaction is via mouse and keyboard.
The left mouse button sweeps out an area for zooming. The right mouse button displays the coordinates of the pointer along with the map scale. For a more detailed description, see the program documentation . Downloading and Building If you don't already have icont installed, follow this link and download Icon for Unix . If you build Icon from source, you'll need both the Unix package and the separate program library package.