English operator: Panoramio described at URL: https://web.archive.org/web/20161017155353/http://www.panoramio.com/photo/44244008 determination method...
English operator: Panoramio described at URL: https://web.archive.org/web/20161016164949/http://www.panoramio.com/photo/44244010 determination method...
Panoramio described at URL: https://web.archive.org/web/20161016212834/http://www.panoramio.com/photo/43257706 determination method or standard: SHA-1...
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