A little birdie told me to hide a puzzle cache, so I did.
Trouble is, the birdie could not get into the cache. Let's see if you can.
This puzzle is twofold: first, use the picture to get the coords, second, open the door (field puzzle).
If successful, please close the door carefully.
Cache is on private property, with permission.
Plenty of roadside parking. Property owner gives permission to park at the end of the driveway.
Use the picture to solve (assume N42 and W080, and NO FOLDING REQUIRED):

Out of consideration for the locals, no night caching.
Please be aware of farm vehicles March - November