LOCO-LD (LOcalization COrrected for Linkage Disequilibrium) is a method for the geographic localization of individuals. It takes as input genotype data and generates, for each individual, an estimate for their geographic coordinates of origin.

LOCO-LD is described here:

Enhanced Localization of Genetic Samples through Linkage-Disequilibrium Correction 
Yael Baran, Inés Quintela, Ángel Carracedo, Bogdan Pasaniuc, Eran Halperin
The American Journal of Human Genetics - 6 June 2013 (Vol. 92, Issue 6, pp. 882-894)

The software is free for non-commercial use, and may be licensed for commercial use. To view the terms and conditions, and then proceed to download, click here.

To view the PDF manual, click here.