Watch this video clip,
http://news.bbc.co.uk/1/hi/sci/tech/7418041.stm.
The interesting bit occurs at around 50 seconds, why the grey circles?
I emailed the BBC for an answer, but of course didn't get a reply.
Bhuvan is the new Asian satellite service,
http://www.bhuvan.nrsc.gov.in/.
Their service does not cover the entire globe, images such as the Poles are supplied to them by a third party. Note the lack of 'fogging' compared to the Google images.
If you watch this video clip and note the 'dot' where the light seems to emanate from, then compare it with the same area on the Bhuvan shot, note the 'mottled' affect which seems to be squared off.
http://www.nasa.gov/mov/133778main_FUV_640x480.mov