English operator: Panoramio described at URL: https://web.archive.org/web/20161027084404/http://www.panoramio.com/photo/75454102...
English operator: Panoramio described at URL: https://web.archive.org/web/20161113021459/http://www.panoramio.com/photo/48456689...
English operator: Panoramio described at URL: https://web.archive.org/web/20161019153005/http://www.panoramio.com/photo/58652288...
English operator: Panoramio described at URL: https://web.archive.org/web/20161015033046/http://www.panoramio.com/photo/37866785...
English operator: Panoramio described at URL: https://web.archive.org/web/20161020044454/http://www.panoramio.com/photo/50896007...
English operator: Panoramio described at URL: https://web.archive.org/web/20161112153937/http://www.panoramio.com/photo/48250849...
English operator: Panoramio described at URL: https://web.archive.org/web/20161022014742/http://www.panoramio.com/photo/60828140...
English operator: Panoramio described at URL: https://web.archive.org/web/20161019153723/http://www.panoramio.com/photo/68625140...
English operator: Panoramio described at URL: https://web.archive.org/web/20161024180256/http://www.panoramio.com/photo/75454220 determination method...
English operator: Panoramio described at URL: https://web.archive.org/web/20161022055633/http://www.panoramio.com/photo/60827992...