I get that the first 6 are supposed to be coordinates for the destination and the last (8th in this case) would be the point of origin while the 7th is supposed to be a distance calibration.. but is that always the same symbol, akin to the "1" preceeding long distance phone numbers (or dialing 9 for an outside number) or is it actually different symbols for different distances more like different area codes?
I guess I'm hoping someone within the show has spoken about this or that someone has seen the 7th symbol of both the Asgard home world and Atlantis addresses for comparison.