In the world of VHF/UHF contesting, an accurate grid reference location is important for distance based scoring. In the old days, 4 digits was more than enough, Melbourne metro is typically QF22, Sydney Metro is typically QF56. 6 digit locations are now the norm for contesting, my place falls under QF22NC. I was looking for how to work out my 8 digit location and found this website that shows my spot to 10 digits, and can calculate distances from A to B grid as well.
A handy resource, *and this blog entry is kind of like my bookmark for the website into the future next time I need a new location and forget!