For South Africa use a file where the South coordinate is bigger than
you center coordinate.
25. 5 degree South, East 31.3 , use S26E031
Unzip the file, and store it in the SRTMDAT Directory.
One has to CONVERT the SRTM file format to the binary DEM file format which is used by the T3D2 code.
Then use the GO SCAN button and create a new site, which got the 3D elevation data with the map section cut out and overlaid.
How to use T3D2 Toolbar option
A file selection pops up. Locate in the file-chooser your input SRTM Data file with a hgt extension which you want to convert.
The file gets converted to a DEM file..
Once converted , use the T3D2
Choose one of the DEM files
Enter the Center coordinates of your flying site In decimal degrees. Like -31.1234 South is negative. West is negative . And define the amount of strips to each side
Change the default site name, if you want
Press GO SCAN
A directory with that name gets created under the sites directory
The code shows some output as it tries to find the site inside the dem data.
Once done, exit, close down the program. Restart and now you should find the new created site in the site selection multichoice. Select the new site
Generates from an IGC file the topo dem data that it covers.
Requires that one picks the correct dem file that matches the flight.
Click on the AutoView button, select an IGC track log, and the code
determines where about this track log is.
It then cuts out of the DEM data the area that you are flying over. Then displays it as a site called Auto or whatever you define it in the Config options.