6th Ed. 2011 1:2,600,000 - This is actually a completely new map, with brand new digital artwork. The map looks significantly different from the previous edition. Roads are much easier to see, highway numbers have been clarified, new highways have been added, and hypsometry has been improved. Most importantly, the new map matches South America North, which came out a year ago. This also completes the transfer of information from the three-sheet series first brought out in 1987, which have been discontinued.