English operator: Panoramio described at URL: https://web.archive.org/web/20161103175751/http://www.panoramio.com/photo/131887419...
English operator: Panoramio described at URL: https://web.archive.org/web/20161031093417/http://www.panoramio.com/photo/112475810...
English operator: Panoramio described at URL: https://web.archive.org/web/20161102114354/http://www.panoramio.com/photo/127037764...
English operator: Panoramio described at URL: https://web.archive.org/web/20161026012312/http://www.panoramio.com/photo/82273294...
English operator: Panoramio described at URL: https://web.archive.org/web/20161031113115/http://www.panoramio.com/photo/127037757...
English operator: Panoramio described at URL: https://web.archive.org/web/20161030230846/http://www.panoramio.com/photo/127037789 determination method...