The free space and map information on this Southern Side is quite a bit different from the Northern side.

It will not have escaped your notice, however, I am sure, that the total available space on each side of these Domesday Discs is the same, at 331,720,704 bytes, or 323,946KB exactly if you prefer, or just over 316MB if you like! Not bad for 1986, I don't think there were many hard discs about with that sort of capacity back then!