code: static public File computeAtlasDir(String name) {
  		File atlasDir = null;
  		
  		if( null == name ) {
  			// Current dir
  			atlasDir = new File(".");
  		} else {
  			atlasDir = new File(name);
  		}
  		
  		// Force absolute
  		if( false == atlasDir.isAbsolute() ){
  			atlasDir = atlasDir.getAbsoluteFile();
  		}
  		
  		return atlasDir;
  	}
docs: Computes the directory where the atlas resides given a command-line
  argument provided by the user. If the argument is not given, then
  this method should be called with a null argument.
  @param name Path given by user at the command-line to refer to the atlas
  @return Directory where atlas resides, based on the given argument