No, there wasn't just "one major burial ground"! Where did you get this record? From ScotlandsPeople? And yes, the figures give the measurement of the person's burial spot from, in this case, South-east of John Gray's headstone.
(BTW, the word is inteRRed, not inteRNed, which is a different word altogether, although there is somewhat of an overlap! 🤣🤣🤣🤣)