In defying my usual puzzling manner, I came-up with something slightly different: a 1 layer puzzle
Here it is:
North-
16
37
32
30
12
10
18
West-
28
3
17
27
36
43
17.5
All of these numbers have something in common. Figure-out what that something is and you will solve the final location of the cache. I’ve left a few clues for good measure. Good luck!
You can validate your puzzle solution with certitude.