I found this nice cemetery while pedaling around the horse farms in Keene.
Posted coords bring you to a well preserved tombstone of a man with the first name Johnson.
The final is at N 37 56.ABC W 084 38.XYZ
ABC = (55 + age at death) * 10
XYZ = (number of letters in whole name) * 3 * 10 + 5
Checksum: A + B + C + X + Y + Z = 30