It claims the correct distribution/shape of the continents:
The boundary for the northern circumpolar star map can be deduced with some accuracy.
http://www.bibliotecapleyades.net/tierra_hueca/tierrahueca/Chapter2.htm"The `Pole,' magnetically speaking, is a very extended area that crosses the Polar Basin from one continent to the other. It is at least 1,000 miles long, and more likely can be said to exist as a rather diffused line for 1,000 miles more. (It is really not a point in the far north, but is the rim of the polar opening, since after Admiral Byrd passed it and entered the polar opening leading to the Earth's interior, he left the Arctic ice and snow behind and entered a warmer territory - Author. ) Thus when Admiral Peary (and any other Arctic explorer who used a magnetic compass) claims to have `reached' the Pole, he is making a very vague claim indeed. He can only say that he reached a point, which can be anywhere in a demonstrable 2,000 mile area (the magnetic rim of the polar opening), where his compass pointed straight down. A noteworthy achievement, but not a `discovery of the Pole.'
http://www.bibliotecapleyades.net/tierra_hueca/tierrahueca/Chapter5.htmThe region the HE take as the entrance to the inner earth, is actually the region on the Flat Earth which cannot be accessed by either land, sea or air, as the expeditions of both Peary and Cook proved clearly: neither could discover the North Pole at all (in Antarctica, we have already seen how R. Scott was assasinated in an earlier discussion). The curvature paradox also applied equally well to the HE hypothesis: since there is no curvature at the surface of the Earth, the Hollow Earth cannot be true.
The boundary consists of aether, a very dense form of energy (see my messages on the FES threads on the Black Sun photographs in Antarctica, also the Allais effect).