I did explain it once already a long time ago - but nobody cared or remembered.
EDIT: People suggested at the time, though not in the picture because it was a thread discussion, should they also search 32x32 and 64x64 and I said yes that is also possible so check them if you want.
I used a compass and used measurements to come up with those numbers - the picture I have been spamming is just the simple version because people have NO attention spans, they just want something to test.
Why don't you read the text on the left-hand side?
I did say, in my image "allow for margin of error" and "check within a degree or two in both latitude/longitude" - and, oh look, new ruins miraculously found at -29 -30.
http://i.imgur.com/hw0OoZJ.jpg
Predictions on your diagram:
1) F class stars (new one is L).
2) New scans for a total of 3 sites (no new scans so far).
Still numerology, not science, as far as I can tell. The starting point of 'it looks like a 20th century Earth key, and so...' isn't strong for space aliens either, unless we are the guardians - so Ridley Scott called it right