English operator: Panoramio described at URL: https://web.archive.org/web/20161030003357/http://www.panoramio.com/photo/95213461...
English operator: Panoramio described at URL: https://web.archive.org/web/20161027193227/http://www.panoramio.com/photo/100934382...
English operator: Panoramio described at URL: https://web.archive.org/web/20161030202220/http://www.panoramio.com/photo/114553643 determination method...
English operator: Panoramio described at URL: https://web.archive.org/web/20161015163358/http://www.panoramio.com/photo/36132585...
English operator: Panoramio described at URL: https://web.archive.org/web/20161015094326/http://www.panoramio.com/photo/36132749...
English operator: Panoramio described at URL: https://web.archive.org/web/20161015131655/http://www.panoramio.com/photo/36132592...