Hi. Welcome. The meaning would necessarily depend upon the orientation of the sign itself and possibly other signs associated with what you have there. One KGC sign means "treasure buried below". Alchemy says "calcination". It could also mean "in route, continue the way you are going". The markings could also be ENTIRELY personal to the maker; meaning you will need access to the meanings of the person's work.
abo,
he thing that jumps out is the large omega sign.so someone had some savvy and that to me would be KGC
what I would do would be to take the compass bearings on both ends of the Omega sign.
If one is a cardinal point, then the J is telling you to reverse your direction and the dot says "10"
could any historical units of measurements
a.feet
b.spanish foot[.9 inch to the foot]
c.chain
d.vara
e.cordell
f.leagues
h.miles
k. kilometers
if say you try 10 varas @34" per vara
dig down very carefully from 8-10" to 2feet looking for an Omega Map Rock
carefully uncover but dont more it until you take compass bearing with a pic
go to ranglersmarksandsign,com for the rest of the vital instructions
oro for the correctly informed
rangler