English operator: Panoramio described at URL: https://web.archive.org/web/20161103011421/http://www.panoramio.com/photo/61435946...
English operator: Panoramio described at URL: https://web.archive.org/web/20161022155936/http://www.panoramio.com/photo/61435767...
Panoramio described at URL: https://web.archive.org/web/20161023180104/http://www.panoramio.com/photo/61435792 determination method or standard: SHA-1...