English operator: Panoramio described at URL: https://web.archive.org/web/20161029014205/http://www.panoramio.com/photo/96419579...
English operator: Panoramio described at URL: https://web.archive.org/web/20161030040723/http://www.panoramio.com/photo/96419599...
English operator: Panoramio described at URL: https://web.archive.org/web/20161030033648/http://www.panoramio.com/photo/96419560 determination method...