Maps of Gettysburg: An Atlas of the Gettysburg Campaign, June 3-July 13, 1863, Bradley M. Gottfried, Savas-Beatie LLC, 363 pp., 149 maps, index, bibliography, 2010, $39.95.
Maps of Gettysburg, Revised Full Color  Edition, is identical in all ways to the original  edition, except on the final page is a brief description of the author. Both editions' list price are $39.95. So, the obvious choice for the first time buyer is choose the Revised Full Color Edition.
So how about those colors? Red (Confederate), purple (Federal), sky blue (streams), green (vegetation), black (labels) gray (fences) and brown-gold (roads at the time of the battle). Each look great on the glossy buff colored paper. The 2007 was gray-scale on white non-glossy paper. Vegetation includes trees, corn, orchards and grains, Fences include worm, post & rail, and stone. Elevations are generalized with hash marks. The maps are scaled for distance.
Maps of Gettysburg  or Phil Laino's Gettysburg Campaign Atlas ? If readers are shopping for an atlas, both are equally valuable. Gottfried's is a hard cover binding and Laino's is paperbound. Gottfried's has smaller dimensions than Laino's. Gottfried's has a sturdy 'perfect' [glued] binding and Laino's has a spiral binding with thick, sturdy wire. Those who are Gettysburg Magazine readers will recognize Laino's work.
Internet buyers should use caution. It appears that many Amazon.com 'second-sellers' do not generally differentiate between the 2007 and the 2010 editions.