The smaller map on the top right is pretty much the entirety of the described locations in the Witcher world in the books and the games, we don't know if there are more continents or more regions than what is described so far.
I didn't know who made the map I posted...until now, searching quickly on Google Images I found the map again (the one I linked is saved in my imgur folder) and the source. It seems the author is Team Ortelius. http://forums.cdprojektred.com/archive/index.php/t-20536.html