English operator: Panoramio described at URL: https://web.archive.org/web/20161023173650/http://www.panoramio.com/photo/63001706...
English operator: Panoramio described at URL: https://web.archive.org/web/20161102162138/http://www.panoramio.com/photo/111010675 determination method...
English operator: Panoramio described at URL: https://web.archive.org/web/20161019190336/http://www.panoramio.com/photo/62624839...