# What are these radial line patterns shown in representations of antarctica?

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?

• The +/-180 meridian is in the area. It looks like there are small polygons there. Possibly not built correctly as islands/holes/doughnuts or whatever so they're "zinging" to the south pole. – mkennedy May 25 '18 at 21:05