English operator: Panoramio described at URL: https://web.archive.org/web/20161020180430/http://www.panoramio.com/photo/67507394...
English operator: Panoramio described at URL: https://web.archive.org/web/20161017075132/http://www.panoramio.com/photo/43281129...
English operator: Panoramio described at URL: https://web.archive.org/web/20161020040117/http://www.panoramio.com/photo/67508631...
English operator: Panoramio described at URL: https://web.archive.org/web/20161021070800/http://www.panoramio.com/photo/67506322...
English operator: Panoramio described at URL: https://web.archive.org/web/20161024022100/http://www.panoramio.com/photo/67507331...
English operator: Panoramio described at URL: https://web.archive.org/web/20161022114648/http://www.panoramio.com/photo/67508753...
English operator: Panoramio described at URL: https://web.archive.org/web/20161021012734/http://www.panoramio.com/photo/67508605 determination method...
English operator: Panoramio described at URL: https://web.archive.org/web/20161025085919/http://www.panoramio.com/photo/74655374 determination method...