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English operator: Panoramio described at URL: https://web.archive.org/web/20161014231250/http://www.panoramio.com/photo/39993445 determination method...
English operator: Panoramio described at URL: https://web.archive.org/web/20161015133225/http://www.panoramio.com/photo/39992010...
English operator: Panoramio described at URL: https://web.archive.org/web/20161015232207/http://www.panoramio.com/photo/39990939...
English operator: Panoramio described at URL: https://web.archive.org/web/20161015172715/http://www.panoramio.com/photo/39991220...
English operator: Panoramio described at URL: https://web.archive.org/web/20161015003508/http://www.panoramio.com/photo/39991214...