This is the 1.7 (and older) version of my map of the USA, for you who can't switch to 1.8 and newer versions. This contains the whole USA map, but the download size is much smaller, since the 1.7 version doesn't have the additional 1.8 blocks that takes up space.
Update: The map is technically completed now. 1.8-1.12 version of this map is being exported right now, and won't be completed until after the weekend. The major change in this update is increased terrain height, where the tallest mountains are as high as the maximum build height! A new arid sub-biome will be added to 1.12.
Link to the 1.8 and newer version of this map: here