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Introduction to g3DGMV (3D Graphical Map Viewer)

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.

In addition g3DGMV can read maps that have been saved as bitmaps (gif ,png, jpeg ,xpm). Because these formats do not contain elevation information they are viewable only in 2D mode.

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.

g3DGMV is an Open Source Free Software program, primarily designed for use with X Window System. It is being developed using the GTK+ and Gnome tools .

If you would like to contribute to this project drop us a line at yostn2000@yahoo.com. Take a look at the "Things to do" list below for some ideas or e-mail us a description of your own ideas so we can coordinate the efforts. You can download the latest version of g3DGMV from our download site. Click on the download button in the menu bar on the left.

Note:There is now a windows version

View the World

Things to do:

This 3D rendering engine needs to be redone. At this point it uses the standard GDK draw functions which are slow. I'm planning to change to the GdkRGB routines or maybe even an OpenGL solution

Redo the icons in the toolbar. Probably need some help on this (I'm no artist).

program has problems reading some DLG formats and requires that a DEM map be loaded first (This needs to be fixed.)

Would like to add support for the SDTS (Spatial Data Transfer Standard) formats

Mapping Standards:

National Mapping Program Standards Digital Line Graph Standards
This USGS site contains technical information about the DLG formats.

National Mapping Program Standards Digital Elevation Model Standards
This USGS site contains technical information about the DEM formats.

USGS National Mapping Information
This page contains links to various mapping related sites and information.

Project leader and coordinator:

Nick Yost - yostn2000@yahoo.com


I'd like to thank the following people who have contributed to this project.

Chuck Gantz- chuck.gantz@globalstar.com wrote the Lat Long - UTMconversion routines and gave me permission to use them.

Carsten Tschach - tschach@zedat.fu-berlin.de wrote the dms.c - routines used to convert positions to various formats.

Do you have any comments about this site? Please drop us a line at yostn2000@yahoo.com