Geolocated images in Wikimedia Commons (2.9M). Image regenerated from Geolocated images in Wikimedia Commons 2012-01-21.png, using "log2()*16" for brightness calculation instead of "380*log10(1+log10(+10)+0.2)" (so single images do not affect the brightness too much). United Kingdom is overpopulated in original image and can not be accurately recalculated.