English operator: Panoramio described at URL: https://web.archive.org/web/20161028113354/http://www.panoramio.com/photo/100842742...
English operator: Panoramio described at URL: https://web.archive.org/web/20161010181804/http://www.panoramio.com/photo/6991394...
English operator: Panoramio described at URL: https://web.archive.org/web/20161023221025/http://www.panoramio.com/photo/59750267 determination method...
archive.org/web/20161014000227/http://www.panoramio.com/user/3794713?with_photo_id=28822764 operator: Panoramio described at URL: https://web.archive...