1 A main compass bearing to travel--on the ground
Not sure, check the green outline circle.
2 A main distance to travel--over the ground
Not sure, check the green outline rectangle.
3 Are there any small deposits of gold ( placer gold, gold ore, or bars of metal ) in the photo ( within 6 feet or less of digging )
For native gold, check the solid yellow circles, the orange seemed to be a man made gold item (religious artifact or jewelry).
4 Are there any small deposits of silver in the photo ( within 6 feet or less of digging )
Blue is some type of silver hit.
5 Are there any caves or tunnels--within the immediate area of this photo.
Check the white line rectangle (best possibility if there is one).