English operator: Panoramio described at URL: https://web.archive.org/web/20161021005003/http://www.panoramio.com/photo/51470444...
English operator: Panoramio described at URL: https://web.archive.org/web/20161103000558/http://www.panoramio.com/photo/100031529...
English operator: Panoramio described at URL: https://web.archive.org/web/20161028212325/http://www.panoramio.com/photo/91198815...
English operator: Panoramio described at URL: https://web.archive.org/web/20161101001021/http://www.panoramio.com/photo/123278360...
English operator: Panoramio described at URL: https://web.archive.org/web/20161027022426/http://www.panoramio.com/photo/81184749...
English operator: Panoramio described at URL: https://web.archive.org/web/20161103051040/http://www.panoramio.com/photo/130566907...
English operator: Panoramio described at URL: https://web.archive.org/web/20161103031745/http://www.panoramio.com/photo/130566910...
English operator: Panoramio described at URL: https://web.archive.org/web/20161023035304/http://www.panoramio.com/photo/57765413...
English operator: Panoramio described at URL: https://web.archive.org/web/20161024020250/http://www.panoramio.com/photo/51638992 determination method...
English operator: Panoramio described at URL: https://web.archive.org/web/20161028122855/http://www.panoramio.com/photo/100902404...