English operator: Panoramio described at URL: https://web.archive.org/web/20161029151629/http://www.panoramio.com/photo/100874990 determination method...
English operator: Panoramio described at URL: https://web.archive.org/web/20161102134551/http://www.panoramio.com/photo/100874742...
English operator: Panoramio described at URL: https://web.archive.org/web/20161030035829/http://www.panoramio.com/photo/100874793...