At the posted coordinates you'll see this gravestone.
Then facing the gravestone go 64 steps 4°. Then you'll see this gravestone.
Get the cords from the gravestone, put them in the checker and you'll get the final cords in the bonus info. Copied this idea from dukemartin. Had a great time doing it at Woodstock had to put one in Fairview. No Night caching!
You can validate your puzzle solution with
certitude.