English operator: Panoramio described at URL: https://web.archive.org/web/20161026005523/http://www.panoramio.com/photo/70973322 determination method...
English operator: Panoramio described at URL: https://web.archive.org/web/20161015112443/http://www.panoramio.com/photo/30586832 determination method...
English operator: Panoramio described at URL: https://web.archive.org/web/20161026040947/http://www.panoramio.com/photo/70973291...
archive.org/web/20161028040738/http://www.panoramio.com/user/7628304?with_photo_id=92419945 operator: Panoramio described at URL: https://web.archive...
archive.org/web/20161015014817/http://www.panoramio.com/user/2474428?with_photo_id=30815393 operator: Panoramio described at URL: https://web.archive...