When you look at. the wall is it a concave or a convex shape and how long is it?
How on Earth do you hope to establish that by simply looking?
By whom
Anyone who wanted to travel there.
and did they not attempt to scale it to see what is beyond?
They did. There are a fair few research stations out there, you know?
How do know it goes around the whole earth?
It has been circumnavigated many times.
There seem to be a lot of claims about this wall with very little evidence.
Yes. I am a big fan of accepting that some things are sufficiently evident as to not require evidence in conversation. For example, I would not demand evidence of you having lungs, or that you have consumed some food within the last 5 months.
I do not quite understand the difference between the ice wall and the "edge"! Is there supposedly an ice wall that extends from Antartica and surrounds the world? Or is the "edge" beyond the ice wall with sea in between? Does the ice wall extend to the "edge"?
There has been several expeditions to Antartica as I am sure you know Pete, since you mention the research stations. Since Roald Amundsen was the first to reach the South Pole in 1914, Antartica has been crossed on foot, by planes and circumnavigated. No ice wall has hindered these expeditions, and Antartica is surrounded by sea on all sides. No ice wall extends from Antartica making it impossible to circumnavigate, and no "edge" has been found on either side of it.
In 2012 a Norwegian expedition followed Roald Amundsens route to the South Pole starting from Ross Barrier up the Axel Heiberg glacier. From the South Pole they went to Hercules Intlet. The went on foot the entire distance. They started by sea and reached the sea. No extended ice wall was observed, and no "edge" found.
In 2005/2006 Norwegian Rune Gjeldnes went by foot from the Novo Station in Queen Maud land via the South Pole to Terra Nova Bay. Sea at starting point, sea at end point. Again, no extended ice wall observed, and no "edge" found.
From the Ross Sea up the Ross Ice Shelf and towards the Axel Heiberg glacier it is about 2800m. Then the glacier takes you another 300m up. It is definately an ice wall, but it does not extend further out from Antartica, and it is not impossible to cross.
The explanation you give here Pete makes no sense at all, so I am eager to learn more from you how this ice wall is supposed to go around the world.
Actually, since you state that the ice wall has been circumnavigated many times you also admit that the earth is round. How else could you circumnavigate the ice wall?