New Atlantis is the codename for the energy grid around the planetary surface that will support the Compression Breakthrough and also the codename for the New Society after the Event.
In Old Atlantis, before the polar shift 75,000 years ago, the position of equator was different and thus the position of the whole planetary energy grid was different also.
75,000 years ago and earlier, the energy gird around the planet was complete, under full control of the Ascended beings and with many sacred temples positioned around the equator. You can see the old Atlantean equator on this picture as a red line crossing South America and Africa:
It is interesting to note that many energy vortexes around the planet are still positioned around the old Atlantean equator: