English operator: Panoramio described at URL: https://web.archive.org/web/20161018014501/http://www.panoramio.com/photo/42919274...
English operator: Panoramio described at URL: https://web.archive.org/web/20161110143153/http://www.panoramio.com/photo/47647792...
English operator: Panoramio described at URL: https://web.archive.org/web/20161109193259/http://www.panoramio.com/photo/47438861 determination method...