The main program is i.ortho.rectify which is just a menu driver for the 
following programs:
 photo.target
 photo.init
 photo.camera
 photo.elev
 photo.2image
 photo.2target
 photo.rectify



The following directories contain the source code:

	menu		-	main menu code
                                -> menu/menu.c

	select_target	-	select target location and mapset
	select_elevation-	select elevation model 
	select_camera	-	select a camera to use for parameters
	image_to_photo		-	code for image to photo coordinate
				-	transformation
	initial_exposure	-	choose initial camera exposure station 
				-	parameters
	photo_to_target		-	computes photo to target location
				-	transformation paramters
	image_rectify		-	does the actual image rectification	

        libes		-	libraries for ortho programs	
        man 		-       manual pages.
