English operator: Panoramio described at URL: https://web.archive.org/web/20161028223230/http://www.panoramio.com/photo/106881472 determination method...
English operator: Panoramio described at URL: https://web.archive.org/web/20161024153435/http://www.panoramio.com/photo/73536455 determination method...
Panoramio described at URL: https://web.archive.org/web/20161025164524/http://www.panoramio.com/photo/73536489 determination method or standard: SHA-1...
Panoramio described at URL: https://web.archive.org/web/20161024175844/http://www.panoramio.com/photo/73539281 determination method or standard: SHA-1...
Panoramio described at URL: https://web.archive.org/web/20161026101952/http://www.panoramio.com/photo/73539248 determination method or standard: SHA-1...