Hi i just read a new intervalometer developed by CHDK geeks specifically for uav and kap photography.
Unlike other scripts for UAV photography like the one of conservation drones, Dronemapper, Event38, etc. With this script you can set a range of values for iso, zoom, av, tv and others feature.
Wha it does is to set a priority kind of level on the Tv (Shutter speed), and adjust the other values (Av, ISO, etc) to get a correctly expose image meeting the desire tv speed. If it cannot adjust the other values, it goes and adjust the Tv mode as a last resource.
So with with you can kiss goodbay to long jorney of works of compensanting and looking for the correct values of av and iso for different scenarios on your mapping missions.
Here is the link.
It has also the ability to select usb remote shot.
It seems quate useful!