The g3DGMV program was designed as a free viewer for Digital Elevation Model (DEM ) and Digital Line Graphs (DLG ) maps. Both of these formats are available from various locations on the web. These maps are rendered by g3DGMV as 3D images that can be manipulated by the user and view from different angles.
The program contains many utilitys that enable the user to add his/her own location information to these maps. These tools can be used to mark a favorite camp site or highlight the best route to some location.