Virtual Illumination of a Satellite Image

The aim of this project is to create a virtual image as viewed from a satellite looking directly down on the DEM. The image will be illuminated based on the direction and elevation of the sun.

1. The program will prompt the user for the name of the DEM file. The file extension(.egm) is not required. The file has to be in the project's file directory.

2. The program will then ask for the output file. The extension (.pgm) is not required

3. The azimuth and elevation values will also be sought for by the program. They must be entered in degrees.

4. The program will retrieve and display the header info of the DEM file, operate on the pixel values, and write the info to the PGM file.