The full picture is 165888x79872 pixels in sizePrinted at 300ppi a poster of this one would be 14m x 7m, so would need the side of a large house to put it up on. And then the people would be around 1mm tall. Displaying it with visible people (aiming at 1cm tall) would need an aircraft hangar (and printing it at 300ppi would require a 1.3 terapixel image), and 250 rolls of plotter paper.
A torrent of all the imageshttps://ubuntuone.com/4VxOo5cnInZWQUEplIdb2c
The thing is so big my work connection is completely unable to load xkcd today (it's crap.. I told them to use A&A but did they listen? Naaaa..).
An easily dragable and zoomable way to view the interesting bits: http://clickanddrag.azurewebsites.net/