Back-to-back rulings by federal appellate courts in Atlanta and New York favoring the National Geographic Society will allow magazine and newspaper publishers to transfer their published archives to computer discs and sell them commercially without infringing on freelance contributors’ copyrights.

National Geographic won its dual victories after more than a decade of litigation in two federal circuits. The publisher of National Geographic has battled freelance writers and photographers over whether it must pay them additional royalties associated with the sale of “The Complete National Geographic” — a digital version of the magazine’s published archive.