In the video of the recent Iridium-6/GRACE-FO launch at about
T+ 33:00 (curently at
49:00 in the video) the 2nd stage passes over Antarctica and this is shown in the animation.
I noticed a strange pattern of radial lines drawn on Antarctica, presumably near the South Pole. I remembered seeing these before and assumed them to be some kind of graphics glitch, until I saw something similar in the BBC News article Giant canyons discovered in Antarctica.
Are the patterns in the two images related, and what do they mean?