This image is a work of a Central Intelligence Agency employee, taken or made during the course of the person's official duties. As a Work of the United States Government, all images created or made by the CIA are in the public domain, with the exception of classified information.
The original map is from 1991 and doesn't show Eritrea yet. Lupo has modified it to also show the border between Ethiopia and Eritrea, and has changed one caption accordingly.