DIY Aerial Photography
This should make it easy to get a good custom mapping of the site. I actually think we should just make it ourselves out of a few trash bags to use for a solar powered hot air balloon. When the air in the balloon heats up it will take off, add some fishing line, a point and shoot camera and you’re good to go.
Another option is to use a mini quadcopter…perhaps this is better for mapping topography. This one is pretty nice and relatively cheap. It’s very small and has a camera built in.