English operator: Panoramio described at URL: https://web.archive.org/web/20161023205436/http://www.panoramio.com/photo/61948016 determination method...
English operator: Panoramio described at URL: https://web.archive.org/web/20161019142020/http://www.panoramio.com/photo/62679646 determination method...
Panoramio described at URL: https://web.archive.org/web/20161014021543/http://www.panoramio.com/photo/25779434 determination method or standard: SHA-1...
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