derivative work of the following images: File:CIA_WorldFactBook-Political_world.svg licensed with PD-USGov-CIA-WF 2008-11-14T16:18:58Z RaviC 3168x2448 (11177399
World map with the torrid zone highlighted. Derived via Inkscape from File:CIA_WorldFactBook-Political_world.svg, which is itself public domain. https://creativecommons