This map is based on a data set generated by the GREG project, which is based at the International Conflict Research Group at the Swiss Federal Institute of Technology (ETH) in Zurich. Scholars from ETH, in collaboration with the Norwegian University of Science and Technology (NTNU) – Trondheim worked to digitize the Soviet Atlas Narodov Mira. Released in 1964, this atlas was created by Soviet ethnographers and takes into account more than 900 ethnic groups. Despite being over four decades old, the Atlas Narodov Mira is widely considered to be the most complete and accurate source of the worldwide spatial distributions of ethnic groups available today.
