The DIRSIG4 codebase now contains a make_dem tool, outputting either ascii or ENVI image digital elevation maps. Gnuplot can visualize the ascii output (via the splot command). ENVI or Freelook can be used to render the image output. The tool currently requires a .cfg file as input, an annoying limitation. This is due to a design issue in the geometry subsystem; it will be addressed in the future.
A blog about the Digital Imaging and Remote Sensing Image Generation (DIRSIG) model featuring posts contributed by the developers. This is not a user manual and it is not a training class. But, it is a place to see what the developers are doing and a little about how we do it. So think of this as a place to learn cool tips, tricks, etc.