Subject:  3DEM: V8.4 Terrain Visualization
Author:  Richard S. Horne
Uploaded By:  Graphic Arts
Date:  7/2/2000

File:  3dem84.zip (1519950 bytes) 
Estimated Download Time (33696 baud):  < 12 minutes
Download Count:  873

Needs:  An UnZIPing Program and WINDOWS 9*/NT/2000

Keywords:  Horne, Flyby, MPEG, USGS, NASA

Type:       Shareware

3DEM  for Win95/98 and WinNT will produce three dimensional terrain scenes and flyby animations from a wide variety of freely available data sources including:

USGS Digital Elevation Model (DEM) files 
USGS Spatial Data Transfer Standard (SDTS DEM) files 
USGS Global 30 Arc Second Elevation Data Set (GTOPO30 DEM) files 
NOAA  Global Land One-km Base Elevation (GLOBE DEM) files 
NASA Mars Digital Topographic Map (DTM) files 
Any topographic data file organized by rows and columns of elevation data 
Internally generated Mandelbrot fractals 

3DEM can merge multiple DEMs to provide high-resolution overhead maps and 3D projections of large surface areas, limited only by the computer's memory. Geographic coordinates (latitude and longitude) are shown on all overhead map displays. Both Lat-Lon and UTM coordinates are supported, allowing display and measurement of position to high accuracy. Global Positioning System (GPS) receiver waypoints, routes, and tracks can be read via serial interface and displayed on 3D images and flybys of the terrain, allowing visualization of the path of a trek through the wilderness.

3DEM uses the SGI/Microsoft OpenGL libraries for high speed 3D rendering.  3DEM will render 16 or 24 bit color three dimensional projections, red-blue projections requiring red-blue 3D glasses for viewing, or color 3D projections requiring Liquid Crystal Shutter (LCS) electronic shutter glasses for viewing.  3DEM scenes can be saved in the following