English operator: Panoramio described at URL: https://web.archive.org/web/20161102210234/http://www.panoramio.com/photo/80959684...
English operator: Panoramio described at URL: https://web.archive.org/web/20161028174021/http://www.panoramio.com/photo/105027176 determination method...
English operator: Panoramio described at URL: https://web.archive.org/web/20161101160128/http://www.panoramio.com/photo/120782650...