i dont know how old those pics are and if its changed alot, but on your aerials where there is like a small strip of timber between 2 fields....that would be your funnel (deer dont want to travel in the open so they will only walk thru timber, the narrow strip of timber "funnels" the deer thru that area). The might be grownup fencerows, ditches, etc....but theyre all over that map.